Is 129 a deficient number and what is its deficiency?

Is 129 a deficient number?

Here we will explain and calculate if 129 is a deficient number and its deficiency if applicable.

129 is a deficient number if the sum of its proper divisors is less than 129.

The sum of its proper divisors is calculated as follows: 1 + 3 + 43 = 47.

47 is less than 129. Therefore, 129 is a deficient number.

The deficiency of 129 is 129 minus the sum of its proper divisors. Thus, the deficiency of 129 is 129 - 47 = 82

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