Q: Is 243,909 a Prime Number?
A: No, 243,909 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 243909 can be evenly divided by 1 3 9 41 123 369 661 1,983 5,949 27,101 81,303 and 243,909, with no remainder.
Since 243,909 cannot be divided by just 1 and 243,909, it is not a prime number.