Q: Is 2,178,397 a Prime Number?
A: No, 2,178,397 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 2178397 can be evenly divided by 1 13 17 221 9,857 128,141 167,569 and 2,178,397, with no remainder.
Since 2,178,397 cannot be divided by just 1 and 2,178,397, it is not a prime number.