Is 685 a deficient number and what is its deficiency?

Is 685 a deficient number?

Here we will explain and calculate if 685 is a deficient number and its deficiency if applicable.

685 is a deficient number if the sum of its proper divisors is less than 685.

The sum of its proper divisors is calculated as follows: 1 + 5 + 137 = 143.

143 is less than 685. Therefore, 685 is a deficient number.

The deficiency of 685 is 685 minus the sum of its proper divisors. Thus, the deficiency of 685 is 685 - 143 = 542

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