Q: Is 643,704 a Prime Number?
A: No, 643,704 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 643704 can be evenly divided by 1 2 3 4 6 8 12 24 26,821 53,642 80,463 107,284 160,926 214,568 321,852 and 643,704, with no remainder.
Since 643,704 cannot be divided by just 1 and 643,704, it is not a prime number.