Q: Is 999,243 a Prime Number?
A: No, 999,243 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 999243 can be evenly divided by 1 3 7 9 17 21 27 51 63 119 153 189 311 357 459 933 1,071 2,177 2,799 3,213 5,287 6,531 8,397 15,861 19,593 37,009 47,583 58,779 111,027 142,749 333,081 and 999,243, with no remainder.
Since 999,243 cannot be divided by just 1 and 999,243, it is not a prime number.