Primes / Is 439 prime?

Is 439 a Prime Number?

Yes

439 is prime: for 439, testing every prime up to √439 ≈ 21.0 (namely 2, 3, 5, 7, 11, 13, 17, 19) finds no divisor. 439 sits between primes 433 and 443, 6 below and 4 above. 439 shares no factor with 2-12; 439's divisors start beyond that range. 439 is odd, digit sum 16 for 439, digital root 7 for 439. 439 has 5 primes within 10 of 439.