Is 9 abundant, deficient, or perfect

Well apparently it has to do with its divisors.

A perfect number: its divisors add up to that number.

Deficient: sum of divisors is less than number.

Abundant: sum of divisors is more than number.

Divisors are like factors other than the number itself, apparently.

Divisors of 9 are: 1,3,3.

1+3+3 = 7.

So 9 is deficient because the sum of its divisors (7) is less than the number itself.

Check to make sure because I just learned by searching it up 2 minutes ago. I may be wrong.