Q: Is 500,643 a Prime Number?
A: No, 500,643 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 500643 can be evenly divided by 1 3 9 11 13 33 39 99 117 143 389 429 1,167 1,287 3,501 4,279 5,057 12,837 15,171 38,511 45,513 55,627 166,881 and 500,643, with no remainder.
Since 500,643 cannot be divided by just 1 and 500,643, it is not a prime number.