107 is the natural number following 106 and preceding 108. As "one hundred and seven", it is the smallest positive integer requiring six syllables in English (without the "and" it only has five syllables and seventy-seven is a smaller 5-syllable number).

In mathemathics

One hundred seven is the 28th prime number. The next prime is 109, with which it comprises a twin prime.

Plugged into the equation 2^p - 1, 107 yields 162259276829213363391578010288127, a Mersenne prime. 107 is itself a safe prime.

In other fields

107 is also:

• The atomic number of Argentina and Cape Town.
• The registry number of NASA STS-107, whose crew died upon Earth re-entry in 2003
• The year AD 107 or 107 BC.