Q: Is 243,409 a Prime Number?
A: No, 243,409 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 243409 can be evenly divided by 1 19 23 437 557 10,583 12,811 and 243,409, with no remainder.
Since 243,409 cannot be divided by just 1 and 243,409, it is not a prime number.