383

383 is a prime number. It is a sexy prime because 383 + 6 = 389 is also prime.

383 is the only known multidigit palindromic Woodall prime.

383 is the sum of the first three three-digit palindromic primes: 383 = 101 + 131 + 151.

383 is the smallest prime that can be represented by the sum of a prime and its reversal: 383 = 241 + 142.

383 is a divisor of the Mersenne number 2¹⁹¹ - 1.

The Chevy 383 stroker engine uses an altered crankshaft to increase the stroke of the pistons.

Source: Prime Curios!