Q: Is 647,720 a Prime Number?
A: No, 647,720 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 647720 can be evenly divided by 1 2 4 5 8 10 20 40 16,193 32,386 64,772 80,965 129,544 161,930 323,860 and 647,720, with no remainder.
Since 647,720 cannot be divided by just 1 and 647,720, it is not a prime number.