Q: Is 133,509 a Prime Number?
A: No, 133,509 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 133509 can be evenly divided by 1 3 191 233 573 699 44,503 and 133,509, with no remainder.
Since 133,509 cannot be divided by just 1 and 133,509, it is not a prime number.