Primes / Is 479 prime?

Is 479 a Prime Number?

Yes

479 is prime: for 479, testing every prime up to √479 ≈ 21.9 (namely 2, 3, 5, 7, 11, 13, 17, 19) finds no divisor. 479 sits between primes 467 and 487, 12 below and 8 above. 479 shares no factor with 2-12; 479's divisors start beyond that range. 479 is odd, digit sum 20 for 479, digital root 2 for 479. 479 has 2 primes within 10 of 479.