Q: Is 139,509 a Prime Number?
A: No, 139,509 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 139509 can be evenly divided by 1 3 9 27 5,167 15,501 46,503 and 139,509, with no remainder.
Since 139,509 cannot be divided by just 1 and 139,509, it is not a prime number.