87 (eighty-seven) is the natural number following 86 and preceding 88. In mathematics, a natural number can mean either an element of the set {1, 2, 3, ...} (i. ... 86 (eighty-six) is the natural number following 85 and preceding 87. ... 88 is the natural number following 87 and preceding 89. ...

← 80 81 82 83 84 85 86 87 88 89 → 79 (seventy-nine) is the natural number following 78 and preceding 80. ... 80 (eighty) is the natural number following 79 and preceding 81. ... 81 is the natural number following 80 and preceding 82. ... 82 is the natural number following 81 and preceding 83. ... 83 (eighty-three) is the natural number following 82 and preceding 84. ... 84 (eighty-four) is the natural number following 83 and preceding 85. ... 85 is the natural number following 84 and preceding 86. ... 86 (eighty-six) is the natural number following 85 and preceding 87. ... 88 is the natural number following 87 and preceding 89. ... Link title89 (eighty-nine) is the natural number following 88 and preceding 90. ... 90 (ninety) is the natural number preceded by 89 and followed by 91. ... List of numbers — Integers This is a list of articles about numbers (not about numerals). ... The integers are commonly denoted by the above symbol. ... 0 10 20 30 40 50 60 70 80 90 → 0 (zero) is both a number and a numerical digit used to represent that number in numerals. ... 10 (ten) is an even natural number following 9 and preceding 11. ... 20 (twenty) is the natural number following 19 and preceding 21. ... 30 (thirty) is the natural number following 29 and preceding 31. ... 40 (forty) is the natural number following 39 and preceding 41. ... 50 (fifty) is the number following 49 and preceding 51. ... 60 (sixty) is the natural number following 59 and preceding 61. ... 70 (seventy) is the natural number following 69 and preceding 71. ... 80 (eighty) is the natural number following 79 and preceding 81. ... 90 (ninety) is the natural number preceded by 89 and followed by 91. ... 100 (one hundred) (the Roman numeral is C for centum) is the natural number following 99 and preceding 101. ...
Cardinal	87 eighty-seven
Ordinal	87th eighty-seventh
Factorization
Divisors	1, 3, 29, 87
Roman numeral	LXXXVII
Binary	01010111
Hexadecimal	57

Aleph-0, the smallest infinite cardinal In mathematics, cardinal numbers, or cardinals for short, are a generalized kind of number used to denote the size of a set. ... Commonly, ordinal numbers, or ordinals for short, are numbers used to denote the position in an ordered sequence: first, second, third, fourth, etc. ... In mathematics, factorization or factoring is the decomposition of an object (for example, a number, a polynomial, or a matrix) into a product of other objects, or factors, which when multiplied together give the original. ... In mathematics, a divisor of an integer n, also called a factor of n, is an integer which evenly divides n without leaving a remainder. ... The system of Roman numerals is a numeral system originating in ancient Rome, and was adapted from Etruscan numerals. ... The binary numeral system (base 2 numerals) represents numeric values using two symbols, typically 0 and 1. ... In mathematics and computer science, base-16, hexadecimal, or simply hex, is a numeral system with a radix or base of 16, usually written using the symbols 0–9 and A–F or a–f. ...

In mathematics

Eighty-seven is the sum of the squares of the first four primes. It is also the sum of the sum of divisors of the first ten integers. 87 is a prime number.

In astronomy

• Messier object M87, a magnitude 11.0 elliptical galaxy in the constellation Virgo, also known as the Virgo A Galaxy
• The New General Catalogue object NGC 87, a galaxy in the constellation Phoenix, a member of Robert's Quartet
• The Saros number of the solar eclipse series which began on 77 BC February 3 and ended on 1222 April 13. The duration of Saros series 87 was 1298.1 years, and it contained 73 solar eclipses. Further, the Saros number of the lunar eclipse series which began on 9 July 25 and ended on 1325 September 23. The duration of Saros series 87 was 1316.2 years, and it contained 74 lunar eclipses.

A giant Hubble mosaic of the Crab Nebula, a supernova remnant. ... The Messier objects are a set of astronomical objects catalogued by Charles Messier in his catalogue of Nebulae and Star Clusters first published in 1774. ... The jet emitted by M87 in this image is thought to be caused by a supermassive black hole at the galaxys center. ... The apparent magnitude (m) of a star, planet or other heavenly body is a measure of its apparent brightness; that is, the amount of light received from the object. ... An elliptical galaxy is a type of galaxy in the Hubble sequence characterized by the following physical properties: The giant elliptical galaxy NGC 4881 (the spherical glow at upper left) lies at the edge of the Coma Cluster of Galaxies. ... This article or section does not cite its references or sources. ... See VIRGO (physics) for a French-Italian project in physics. ... The jet emitted by M87 in this image is thought to be caused by a supermassive black hole at the galaxys center. ... The New General Catalogue (NGC) is the most well-known catalogue of deep sky objects in amateur astronomy. ... NGC 4414, a typical spiral galaxy in the constellation Coma Berenices, is about 17,000 parsecs in diameter and approximately 20 million parsecs distant. ... Categories: Astronomy stubs | Modern constellations | Constellations ... Roberts Quartet or AM 0018-0485 is the name given to the gravitationally interacting group of galaxies NGC 87, NGC 88, NGC 89, and NGC 92 by Halton Arp, who compiled A Catalogue of Southern Peculiar Galaxies and Associations (1987). ... A Saros cycle is a period of 6585 + 1/3 days (approximately 18 years 10 days and 8 hours) which can be used to predict eclipses of the sun and the moon. ... Photo taken during the 1999 eclipse. ... Centuries: 2nd century BC - 1st century BC - 1st century Decades: 120s BC 110s BC 100s BC 90s BC 80s BC - 70s BC - 60s BC 50s BC 40s BC 30s BC 20s BC Years: 82 BC 81 BC 80 BC 79 BC 78 BC - 77 BC - 76 BC 75 BC 74... February 3 is the 34th day of the year in the Gregorian Calendar. ... Centuries: 12th century - 13th century - 14th century Decades: 1170s 1180s 1190s 1200s 1210s - 1220s - 1230s 1240s 1250s 1260s 1270s Years: 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 See also: 1222 state leaders Events Foundation of the University of Padua Completion of the Cistercian convent in Alcobaca... April 13 is the 103rd day of the year in the Gregorian calendar (104th in leap years). ... An eclipse refers to the phenomenon of one body passing into the shadow cast by another body. ... For other uses, see 9 (disambiguation). ... July 25 is the 206th day (207th in leap years) of the year in the Gregorian calendar, with 159 days remaining. ... Events January 7:Alfonso IV becomes the King of Portugal. ... September 23 is the 266th day of the year (267th in leap years). ...

In other fields

Ju 87

Eighty-seven is also: Junkers Ju 87 Stuka dive-bombers. ... Junkers Ju 87 Stuka dive-bombers. ... Junkers Ju 87 Dive-Bombers The Junkers Ju 87 or Stuka was the best known Sturzkampfflugzeug (German dive bomber) in World War II, instantly recognisable by its inverted gull wings, fixed undercarriage and siren. ...

• The atomic number of francium
• considered an unlucky score in cricket in Australia, thought to originate from the fact that 87 is 13 runs short of a century, equivalent a Nelson's, Double-Nelson's etc (111, 222 etc) in English cricket.
• the number of years between the signing of the U.S. Declaration of Independence and the Battle of Gettysburg, immortalized in Abraham Lincoln's Gettysburg Address: Fourscore and seven years ago, our forefathers...
• the model number of Junkers Ju 87
• the number of the French department Haute-Vienne
• the designation of Interstate 87, a freeway in New York; the European route E87 from Tulcea to Antalya
• the code for international direct dial phone calls to Inmarsat and other services
• the 87 photographic filter blocks visible light allowing only infrared light to pass
• considered an unlucky number of runs by some players in the sport of cricket, because it is 13 less than 100.
• a slang term for anilingus
• The ISBN Group Identifier for books published in Denmark.
• The year AD 87, 87 BC, or 1987.
• 87 is the exact number of people who died in the Waco Branch Davidian fire.
• the opus number of the 24 Preludes and Fugues of Dmitri Shostakovich.
• The uniform numbers of hockey superstar Sidney Crosby and Denver Broncos wide receiver Ed McCaffrey.