Q: Is 621,607 a Prime Number?
A: No, 621,607 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 621607 can be evenly divided by 1 7 88,801 and 621,607, with no remainder.
Since 621,607 cannot be divided by just 1 and 621,607, it is not a prime number.