Q: Is 509,859 a Prime Number?
A: No, 509,859 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 509859 can be evenly divided by 1 3 7 9 21 63 8,093 24,279 56,651 72,837 169,953 and 509,859, with no remainder.
Since 509,859 cannot be divided by just 1 and 509,859, it is not a prime number.