Primes / Is 163 prime?

Is 163 a Prime Number?

Yes

163 is prime: for 163, testing every prime up to √163 ≈ 12.8 (namely 2, 3, 5, 7, 11) finds no divisor. 163 sits between primes 157 and 167, 6 below and 4 above. 163 shares no factor with 2-12; 163's divisors start beyond that range. 163 is odd, digit sum 10 for 163, digital root 1 for 163. 163 has 4 primes within 10 of 163.