Q: Is 1,643,009 a Prime Number?
A: No, 1,643,009 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 1643009 can be evenly divided by 1 193 8,513 and 1,643,009, with no remainder.
Since 1,643,009 cannot be divided by just 1 and 1,643,009, it is not a prime number.