Q: Is 631,720 a Prime Number?
A: No, 631,720 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 631720 can be evenly divided by 1 2 4 5 8 10 17 20 34 40 68 85 136 170 340 680 929 1,858 3,716 4,645 7,432 9,290 15,793 18,580 31,586 37,160 63,172 78,965 126,344 157,930 315,860 and 631,720, with no remainder.
Since 631,720 cannot be divided by just 1 and 631,720, it is not a prime number.