Q: Is 135,999 a Prime Number?
A: No, 135,999 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 135999 can be evenly divided by 1 3 9 23 27 69 73 81 207 219 621 657 1,679 1,863 1,971 5,037 5,913 15,111 45,333 and 135,999, with no remainder.
Since 135,999 cannot be divided by just 1 and 135,999, it is not a prime number.