Q: Is 129 a Prime Number?
A: No, 129 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 129 can be evenly divided by 1 3 43 and 129, with no remainder.
Since 129 cannot be divided by just 1 and 129, it is not a prime number.