Primes / Is 389 prime?

Is 389 a Prime Number?

Yes

389 is prime: for 389, testing every prime up to √389 ≈ 19.7 (namely 2, 3, 5, 7, 11, 13, 17, 19) finds no divisor. 389 sits between primes 383 and 397, 6 below and 8 above. 389 shares no factor with 2-12; 389's divisors start beyond that range. 389 is odd, digit sum 20 for 389, digital root 2 for 389. 389 has 4 primes within 10 of 389.