Q: Is 645,779 a Prime Number?
A: No, 645,779 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 645779 can be evenly divided by 1 17 37,987 and 645,779, with no remainder.
Since 645,779 cannot be divided by just 1 and 645,779, it is not a prime number.