Q: Is 640,617 a Prime Number?
A: No, 640,617 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 640617 can be evenly divided by 1 3 213,539 and 640,617, with no remainder.
Since 640,617 cannot be divided by just 1 and 640,617, it is not a prime number.