Q: Is 501,399 a Prime Number?
A: No, 501,399 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 501399 can be evenly divided by 1 3 9 55,711 167,133 and 501,399, with no remainder.
Since 501,399 cannot be divided by just 1 and 501,399, it is not a prime number.