199 is the natural number between 198 and 200. It is also a prime number. 200 is the natural number following 199 and preceding 201. ... In mathematics, a prime number (or prime) is a natural number greater than one whose only positive divisors are one and itself. ...

Commonly, ordinal numbers, or ordinals for short, are numbers used to denote the position in an ordered sequence: first, second, third, fourth, etc. ... In linguistics, cardinal numbers is the name given to number words that are used for quantity (one, two, three), as opposed to ordinal numbers, words that are used for order (first, second, third). ... This article is about the mathematical concept. ... In mathematics, a prime number (or prime) is a natural number greater than one whose only positive divisors are one and itself. ... The system of Roman numerals is a numeral system originating in ancient Rome, and was adapted from Etruscan numerals. ... The binary or base-two numeral system is a system for representing numbers in which a radix of two is used; that is, each digit in a binary numeral may have either of two different values. ... In mathematics and computer science, 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

199 is a prime number, a Wagstaff prime, and a twin prime with 197. Coming at the end of a prime quadruplet, 199 sets a record low of the Mertens function, -8. 199 is the sum of three consecutive primes (61 + 67 + 71) as well as the sum of five consecutive primes (31 + 37 + 41 + 43 + 47). In mathematics, a prime number (or prime) is a natural number greater than one whose only positive divisors are one and itself. ... In mathematics, a prime number of the form (2p + 1) / 3 for a prime number p is called a Wagstaff prime; they are related to the New Mersenne conjecture. ... A twin prime is a prime number that differs from another prime number by two. ... 197 is the natural number between 196 and 198. ... A prime quadruplet is a group of four primes, consisting of two pairs of twin primes separated only by three non-primes, specifically, a multiple of 2, a multiple of 15 and another multiple of 2. ... In number theory, the Mertens function is where μ(k) is the Möbius function. ...

199 is a Lucas number, and also a centered triangular number. In mathematics, the Fibonacci numbers form a sequence defined recursively by: In words: you start with 0 and 1, and then produce the next Fibonacci number by adding the two previous Fibonacci numbers. ... A centered triangular number is a centered figurate number that represents a triangle with a dot in the center and all other dots surrounding the center in successive triangular layers. ...