Q: Is 513,639 a Prime Number?
A: No, 513,639 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 513639 can be evenly divided by 1 3 7 9 21 31 63 93 217 263 279 651 789 1,841 1,953 2,367 5,523 8,153 16,569 24,459 57,071 73,377 171,213 and 513,639, with no remainder.
Since 513,639 cannot be divided by just 1 and 513,639, it is not a prime number.