Q: Is 321,789 a Prime Number?
A: No, 321,789 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 321789 can be evenly divided by 1 3 13 37 39 111 223 481 669 1,443 2,899 8,251 8,697 24,753 107,263 and 321,789, with no remainder.
Since 321,789 cannot be divided by just 1 and 321,789, it is not a prime number.