Q: Is 645,317 a Prime Number?
A: No, 645,317 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 645317 can be evenly divided by 1 37 107 163 3,959 6,031 17,441 and 645,317, with no remainder.
Since 645,317 cannot be divided by just 1 and 645,317, it is not a prime number.