Q: Is 209,643 a Prime Number?
A: No, 209,643 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 209643 can be evenly divided by 1 3 7 21 67 149 201 447 469 1,043 1,407 3,129 9,983 29,949 69,881 and 209,643, with no remainder.
Since 209,643 cannot be divided by just 1 and 209,643, it is not a prime number.