Q: Is 243,990 a Prime Number?
A: No, 243,990 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 243990 can be evenly divided by 1 2 3 5 6 9 10 15 18 30 45 90 2,711 5,422 8,133 13,555 16,266 24,399 27,110 40,665 48,798 81,330 121,995 and 243,990, with no remainder.
Since 243,990 cannot be divided by just 1 and 243,990, it is not a prime number.