Is 289 a deficient number and what is its deficiency?

Is 289 a deficient number?

Here we will explain and calculate if 289 is a deficient number and its deficiency if applicable.

289 is a deficient number if the sum of its proper divisors is less than 289.

The sum of its proper divisors is calculated as follows: 1 + 17 = 18.

18 is less than 289. Therefore, 289 is a deficient number.

The deficiency of 289 is 289 minus the sum of its proper divisors. Thus, the deficiency of 289 is 289 - 18 = 271

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