Q: Is 671,643 a Composite Number?
A: Yes, 671,643 is a composite number.
The number 671,643 can be evenly divided by 1 3 7 9 21 49 63 147 441 1,523 4,569 10,661 13,707 31,983 74,627 95,949 223,881 and 671,643, with no remainder.
Since 671,643 cannot be divided by just 1 and 671,643, it is a composite number.