Q: Is 645,764 a Prime Number?
A: No, 645,764 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 645764 can be evenly divided by 1 2 4 7 14 28 23,063 46,126 92,252 161,441 322,882 and 645,764, with no remainder.
Since 645,764 cannot be divided by just 1 and 645,764, it is not a prime number.