Q: Is 685,688 a Prime Number?
A: No, 685,688 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 685688 can be evenly divided by 1 2 4 8 85,711 171,422 342,844 and 685,688, with no remainder.
Since 685,688 cannot be divided by just 1 and 685,688, it is not a prime number.