Is 721 a deficient number and what is its deficiency?

Is 721 a deficient number?

Here we will explain and calculate if 721 is a deficient number and its deficiency if applicable.

721 is a deficient number if the sum of its proper divisors is less than 721.

The sum of its proper divisors is calculated as follows: 1 + 7 + 103 = 111.

111 is less than 721. Therefore, 721 is a deficient number.

The deficiency of 721 is 721 minus the sum of its proper divisors. Thus, the deficiency of 721 is 721 - 111 = 610

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