Primes / Is 83 prime?

Is 83 a Prime Number?

Yes

83 is prime: for 83, testing every prime up to √83 ≈ 9.1 (namely 2, 3, 5, 7) finds no divisor. 83 sits between primes 79 and 89, 4 below and 6 above. 83 shares no factor with 2-12; 83's divisors start beyond that range. 83 is odd, digit sum 11 for 83, digital root 2 for 83. 83 has 4 primes within 10 of 83.