Q: Is 135,643 a Prime Number?
A: No, 135,643 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 135643 can be evenly divided by 1 17 79 101 1,343 1,717 7,979 and 135,643, with no remainder.
Since 135,643 cannot be divided by just 1 and 135,643, it is not a prime number.