Q: Is 243,109 a Prime Number?
A: Yes, 243,109 is a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 243109 can be evenly divided by 1 and 243,109, with no remainder.
Since 243,109 can be divided by just 1 and 243,109, it is a prime number.