Q: Is 720,509 a Prime Number?
A: No, 720,509 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 720509 can be evenly divided by 1 607 1,187 and 720,509, with no remainder.
Since 720,509 cannot be divided by just 1 and 720,509, it is not a prime number.