Is 1809 a deficient number and what is its deficiency?

Is 1809 a deficient number?

Here we will explain and calculate if 1809 is a deficient number and its deficiency if applicable.

1809 is a deficient number if the sum of its proper divisors is less than 1809.

The sum of its proper divisors is calculated as follows: 1 + 3 + 9 + 27 + 67 + 201 + 603 = 911.

911 is less than 1809. Therefore, 1809 is a deficient number.

The deficiency of 1809 is 1809 minus the sum of its proper divisors. Thus, the deficiency of 1809 is 1809 - 911 = 898

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