Q: Is 646,738 a Prime Number?
A: No, 646,738 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 646738 can be evenly divided by 1 2 323,369 and 646,738, with no remainder.
Since 646,738 cannot be divided by just 1 and 646,738, it is not a prime number.