Q: Is 686,604 a Prime Number?
A: No, 686,604 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 686604 can be evenly divided by 1 2 3 4 6 12 29 58 87 116 174 348 1,973 3,946 5,919 7,892 11,838 23,676 57,217 114,434 171,651 228,868 343,302 and 686,604, with no remainder.
Since 686,604 cannot be divided by just 1 and 686,604, it is not a prime number.