Q: Is 640,630 a Prime Number?
A: No, 640,630 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 640630 can be evenly divided by 1 2 5 10 64,063 128,126 320,315 and 640,630, with no remainder.
Since 640,630 cannot be divided by just 1 and 640,630, it is not a prime number.