Q: Is 423,909 a Prime Number?
A: No, 423,909 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 423909 can be evenly divided by 1 3 9 19 37 57 67 111 171 201 333 603 703 1,273 2,109 2,479 3,819 6,327 7,437 11,457 22,311 47,101 141,303 and 423,909, with no remainder.
Since 423,909 cannot be divided by just 1 and 423,909, it is not a prime number.