Is 1643 a deficient number and what is its deficiency?

Is 1643 a deficient number?

Here we will explain and calculate if 1643 is a deficient number and its deficiency if applicable.

1643 is a deficient number if the sum of its proper divisors is less than 1643.

The sum of its proper divisors is calculated as follows: 1 + 31 + 53 = 85.

85 is less than 1643. Therefore, 1643 is a deficient number.

The deficiency of 1643 is 1643 minus the sum of its proper divisors. Thus, the deficiency of 1643 is 1643 - 85 = 1558

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