Q: Is 509,866 a Prime Number?
A: No, 509,866 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 509866 can be evenly divided by 1 2 7 14 79 158 461 553 922 1,106 3,227 6,454 36,419 72,838 254,933 and 509,866, with no remainder.
Since 509,866 cannot be divided by just 1 and 509,866, it is not a prime number.