Q: Is 637,639 a Prime Number?
A: No, 637,639 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 637639 can be evenly divided by 1 31 67 307 2,077 9,517 20,569 and 637,639, with no remainder.
Since 637,639 cannot be divided by just 1 and 637,639, it is not a prime number.