Q: Is 685,423 a Prime Number?
A: No, 685,423 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 685423 can be evenly divided by 1 17 23 391 1,753 29,801 40,319 and 685,423, with no remainder.
Since 685,423 cannot be divided by just 1 and 685,423, it is not a prime number.