Q: Is 645,677 a Prime Number?
A: No, 645,677 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 645677 can be evenly divided by 1 17 19 323 1,999 33,983 37,981 and 645,677, with no remainder.
Since 645,677 cannot be divided by just 1 and 645,677, it is not a prime number.