Q: Is 509,959 a Prime Number?
A: Yes, 509,959 is a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 509959 can be evenly divided by 1 and 509,959, with no remainder.
Since 509,959 can be divided by just 1 and 509,959, it is a prime number.