Q: Is 678,620 a Prime Number?
A: No, 678,620 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 678620 can be evenly divided by 1 2 4 5 10 20 33,931 67,862 135,724 169,655 339,310 and 678,620, with no remainder.
Since 678,620 cannot be divided by just 1 and 678,620, it is not a prime number.