Q: Is 688,990 a Prime Number?
A: No, 688,990 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 688990 can be evenly divided by 1 2 5 10 68,899 137,798 344,495 and 688,990, with no remainder.
Since 688,990 cannot be divided by just 1 and 688,990, it is not a prime number.