Q: Is 638,630 a Prime Number?
A: No, 638,630 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 638630 can be evenly divided by 1 2 5 10 63,863 127,726 319,315 and 638,630, with no remainder.
Since 638,630 cannot be divided by just 1 and 638,630, it is not a prime number.