Is 1389 a deficient number and what is its deficiency?

Is 1389 a deficient number?

Here we will explain and calculate if 1389 is a deficient number and its deficiency if applicable.

1389 is a deficient number if the sum of its proper divisors is less than 1389.

The sum of its proper divisors is calculated as follows: 1 + 3 + 463 = 467.

467 is less than 1389. Therefore, 1389 is a deficient number.

The deficiency of 1389 is 1389 minus the sum of its proper divisors. Thus, the deficiency of 1389 is 1389 - 467 = 922

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