Q: Is 646,718 a Prime Number?
A: No, 646,718 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 646718 can be evenly divided by 1 2 323,359 and 646,718, with no remainder.
Since 646,718 cannot be divided by just 1 and 646,718, it is not a prime number.