Q: Is 686,820 a Prime Number?
A: No, 686,820 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 686820 can be evenly divided by 1 2 3 4 5 6 10 12 15 20 30 60 11,447 22,894 34,341 45,788 57,235 68,682 114,470 137,364 171,705 228,940 343,410 and 686,820, with no remainder.
Since 686,820 cannot be divided by just 1 and 686,820, it is not a prime number.