Is 1309 a deficient number and what is its deficiency?

Is 1309 a deficient number?

Here we will explain and calculate if 1309 is a deficient number and its deficiency if applicable.

1309 is a deficient number if the sum of its proper divisors is less than 1309.

The sum of its proper divisors is calculated as follows: 1 + 7 + 11 + 17 + 77 + 119 + 187 = 419.

419 is less than 1309. Therefore, 1309 is a deficient number.

The deficiency of 1309 is 1309 minus the sum of its proper divisors. Thus, the deficiency of 1309 is 1309 - 419 = 890

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