1337

1337 = 7 x 191.

1337 is a number with exactly two palindromic prime factors and no other prime factors (A046368).

1337 is the smallest number m such that reversal of m¹⁰⁰⁰ is prime.

1337 is a multiple of 7 such that its digit sum (1 + 3 + 3 + 7 = 14) is divisible by 7 (A216994).

1337 is the product of two distinct primes a and b such that a + b is the average of a twin prime pair (A176875): 7 + 191 = 198 = (197 + 199)/2.

1337 is the average of three successive primes, each squared (A075893).

1337 is a multiple of 7 containing only odd digits (A061825).

1337 is a divisor of 39¹⁵ - 1.

1137 Gerarda is an asteroid discovered in 1934.

Leet (or "1337") is an alternative alphabet for the English language that is used mainly on the Internet.

Source: Number Gossip