Q: Is 685,940 a Prime Number?
A: No, 685,940 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 685940 can be evenly divided by 1 2 4 5 10 20 34,297 68,594 137,188 171,485 342,970 and 685,940, with no remainder.
Since 685,940 cannot be divided by just 1 and 685,940, it is not a prime number.