Q: Is 685,808 a Prime Number?
A: No, 685,808 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 685808 can be evenly divided by 1 2 4 8 16 42,863 85,726 171,452 342,904 and 685,808, with no remainder.
Since 685,808 cannot be divided by just 1 and 685,808, it is not a prime number.