Primes / Is 239 prime?

Is 239 a Prime Number?

Yes

239 is prime: for 239, testing every prime up to √239 ≈ 15.5 (namely 2, 3, 5, 7, 11, 13) finds no divisor. 239 sits between primes 233 and 241, 6 below and 2 above. 239 shares no factor with 2-12; 239's divisors start beyond that range. 239 is odd, digit sum 14 for 239, digital root 5 for 239. 239 has 4 primes within 10 of 239.