Q: Is 509,439 a Prime Number?
A: No, 509,439 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 509439 can be evenly divided by 1 3 7 17 21 51 119 357 1,427 4,281 9,989 24,259 29,967 72,777 169,813 and 509,439, with no remainder.
Since 509,439 cannot be divided by just 1 and 509,439, it is not a prime number.