Is 643 a deficient number and what is its deficiency?

Is 643 a deficient number?

Here we will explain and calculate if 643 is a deficient number and its deficiency if applicable.

643 is a deficient number if the sum of its proper divisors is less than 643.

The sum of its proper divisors is calculated as follows: 1 = 1.

1 is less than 643. Therefore, 643 is a deficient number.

The deficiency of 643 is 643 minus the sum of its proper divisors. Thus, the deficiency of 643 is 643 - 1 = 642

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

Is 644 a deficient number?
Go here for the next number on our list. Is it deficient?