Is 13 a deficient number and what is its deficiency?

Is 13 a deficient number?

Here we will explain and calculate if 13 is a deficient number and its deficiency if applicable.

13 is a deficient number if the sum of its proper divisors is less than 13.

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

1 is less than 13. Therefore, 13 is a deficient number.

The deficiency of 13 is 13 minus the sum of its proper divisors. Thus, the deficiency of 13 is 13 - 1 = 12

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