Q: Is 138,243 a Prime Number?
A: No, 138,243 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 138243 can be evenly divided by 1 3 7 21 29 87 203 227 609 681 1,589 4,767 6,583 19,749 46,081 and 138,243, with no remainder.
Since 138,243 cannot be divided by just 1 and 138,243, it is not a prime number.