Q: Is 645,613 a Prime Number?
A: No, 645,613 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 645613 can be evenly divided by 1 37 17,449 and 645,613, with no remainder.
Since 645,613 cannot be divided by just 1 and 645,613, it is not a prime number.