Q: Is 688,580 a Prime Number?
A: No, 688,580 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 688580 can be evenly divided by 1 2 4 5 10 20 34,429 68,858 137,716 172,145 344,290 and 688,580, with no remainder.
Since 688,580 cannot be divided by just 1 and 688,580, it is not a prime number.