619

619 is a prime number.

617 and 619 form a twin prime pair.

619 = 6! - 5! + 4! - 3! + 2! - 1!

619 is the only strobogrammatic prime with distinct digits. It is the smallest strobogrammatic prime that is not a palindrome.

Nova 619 is a webcomic.

Source: Prime Curios!