Q: Is 640,409 a Composite Number?
A: Yes, 640,409 is a composite number.
The number 640,409 can be evenly divided by 1 7 11 77 8,317 58,219 91,487 and 640,409, with no remainder.
Since 640,409 cannot be divided by just 1 and 640,409, it is a composite number.