Q: Is 645,797 a Prime Number?
A: No, 645,797 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 645797 can be evenly divided by 1 661 977 and 645,797, with no remainder.
Since 645,797 cannot be divided by just 1 and 645,797, it is not a prime number.