Is 243 a deficient number and what is its deficiency?

Is 243 a deficient number?

Here we will explain and calculate if 243 is a deficient number and its deficiency if applicable.

243 is a deficient number if the sum of its proper divisors is less than 243.

The sum of its proper divisors is calculated as follows: 1 + 3 + 9 + 27 + 81 = 121.

121 is less than 243. Therefore, 243 is a deficient number.

The deficiency of 243 is 243 minus the sum of its proper divisors. Thus, the deficiency of 243 is 243 - 121 = 122

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