Q: Is 640,017 a Prime Number?
A: No, 640,017 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 640017 can be evenly divided by 1 3 7 9 21 63 10,159 30,477 71,113 91,431 213,339 and 640,017, with no remainder.
Since 640,017 cannot be divided by just 1 and 640,017, it is not a prime number.