Q: Is 680,721 a Prime Number?
A: No, 680,721 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 680721 can be evenly divided by 1 3 226,907 and 680,721, with no remainder.
Since 680,721 cannot be divided by just 1 and 680,721, it is not a prime number.