Is 2009 a deficient number and what is its deficiency?

Is 2009 a deficient number?

Here we will explain and calculate if 2009 is a deficient number and its deficiency if applicable.

2009 is a deficient number if the sum of its proper divisors is less than 2009.

The sum of its proper divisors is calculated as follows: 1 + 7 + 41 + 49 + 287 = 385.

385 is less than 2009. Therefore, 2009 is a deficient number.

The deficiency of 2009 is 2009 minus the sum of its proper divisors. Thus, the deficiency of 2009 is 2009 - 385 = 1624

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