Q: Is 640,508 a Prime Number?
A: No, 640,508 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 640508 can be evenly divided by 1 2 4 11 22 44 14,557 29,114 58,228 160,127 320,254 and 640,508, with no remainder.
Since 640,508 cannot be divided by just 1 and 640,508, it is not a prime number.