Q: Is 640,909 a Prime Number?
A: No, 640,909 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 640909 can be evenly divided by 1 347 1,847 and 640,909, with no remainder.
Since 640,909 cannot be divided by just 1 and 640,909, it is not a prime number.