Primes / Is 85 prime?

Is 85 a Prime Number?

No85 = 5 x 17

85 is NOT prime: 5 × 17 = 85. That makes 5 a genuine divisor of 85 beyond 1 and 85 itself. Fully broken down, 85 = 5 × 17, for 4 divisors total. 85 sits between primes 83 and 89, 2 below and 4 above. 85: 5 divide 85 evenly, checked against 2-12. 85 is odd, digit sum 13 for 85, digital root 4 for 85. 85 has 3 primes within 10 of 85.