Is 391 a deficient number and what is its deficiency?

Is 391 a deficient number?

Here we will explain and calculate if 391 is a deficient number and its deficiency if applicable.

391 is a deficient number if the sum of its proper divisors is less than 391.

The sum of its proper divisors is calculated as follows: 1 + 17 + 23 = 41.

41 is less than 391. Therefore, 391 is a deficient number.

The deficiency of 391 is 391 minus the sum of its proper divisors. Thus, the deficiency of 391 is 391 - 41 = 350

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