Q: Is 821,608 a Prime Number?
A: No, 821,608 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 821608 can be evenly divided by 1 2 4 8 102,701 205,402 410,804 and 821,608, with no remainder.
Since 821,608 cannot be divided by just 1 and 821,608, it is not a prime number.