Q: Is 688,921 a Prime Number?
A: No, 688,921 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 688921 can be evenly divided by 1 19 101 359 1,919 6,821 36,259 and 688,921, with no remainder.
Since 688,921 cannot be divided by just 1 and 688,921, it is not a prime number.