Q: Is 640,789 a Prime Number?
A: No, 640,789 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 640789 can be evenly divided by 1 41 15,629 and 640,789, with no remainder.
Since 640,789 cannot be divided by just 1 and 640,789, it is not a prime number.