Is 1689 a deficient number and what is its deficiency?

Is 1689 a deficient number?

Here we will explain and calculate if 1689 is a deficient number and its deficiency if applicable.

1689 is a deficient number if the sum of its proper divisors is less than 1689.

The sum of its proper divisors is calculated as follows: 1 + 3 + 563 = 567.

567 is less than 1689. Therefore, 1689 is a deficient number.

The deficiency of 1689 is 1689 minus the sum of its proper divisors. Thus, the deficiency of 1689 is 1689 - 567 = 1122

Deficient Calculator
You can enter another number here to check if it is a deficient number:

Is 1690 a deficient number?
Go here for the next number on our list. Is it deficient?