Is 2001 a deficient number and what is its deficiency?

Is 2001 a deficient number?

Here we will explain and calculate if 2001 is a deficient number and its deficiency if applicable.

2001 is a deficient number if the sum of its proper divisors is less than 2001.

The sum of its proper divisors is calculated as follows: 1 + 3 + 23 + 29 + 69 + 87 + 667 = 879.

879 is less than 2001. Therefore, 2001 is a deficient number.

The deficiency of 2001 is 2001 minus the sum of its proper divisors. Thus, the deficiency of 2001 is 2001 - 879 = 1122

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