Q: Is 637,645 a Prime Number?
A: No, 637,645 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 637645 can be evenly divided by 1 5 127,529 and 637,645, with no remainder.
Since 637,645 cannot be divided by just 1 and 637,645, it is not a prime number.