Q: Is 685,670 a Prime Number?
A: No, 685,670 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 685670 can be evenly divided by 1 2 5 10 68,567 137,134 342,835 and 685,670, with no remainder.
Since 685,670 cannot be divided by just 1 and 685,670, it is not a prime number.