Q: Is 620 a Prime Number?
A: No, 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 620 can be evenly divided by 1 2 4 5 10 20 31 62 124 155 310 and 620, with no remainder.
Since 620 cannot be divided by just 1 and 620, it is not a prime number.