Q: Is 778,321 a Prime Number?
A: No, 778,321 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 778321 can be evenly divided by 1 347 2,243 and 778,321, with no remainder.
Since 778,321 cannot be divided by just 1 and 778,321, it is not a prime number.