107

107 is a prime number.

107 is 1101011 in base 2 (binary).

107 and 109 form a twin prime pair.

2¹⁰⁷ - 1 is a Mersenne prime.

107 is the smallest three-digit prime that remains a prime when 2 is added to any one of its digits: 307, 127, and 109 are all primes.

107 is the maximum number of steps that a four-state Turing machine can make on an initially blank tape before it halts.

107 Camilla is one of the largest main-belt asteroids.

Source: Prime Curios!