389

389 is a prime number.

389 is the first in the smallest set of four consecutive primes (389, 397, 401, 409) that are congruent to 1 (mod 4). In other words, dividing each of these primes by 4 leaves a remainder of 1.

389 has a representation as a sum of two squares: 389 = 10² + 17².

389 is the hypotenuse of a primitive Pythagorean triple: 389² = 189² + 340².


St. Patrick was born in Roman Britain in the year 389 A.D.

Source: Prime Curios!