2023 is the sum of its digits times the square of the sum of the digits squared: (2 + 0 + 2 + 3 = 7)(2 x 2 + 0 x 0 + 2 x 2 + 3 X 3 = 17)(2 x 2 + 0 x 0 + 2 x 2 + 3 X 3 = 17) = 7 x 17 x 17 =
2023 (
A257766).
2023 is a number that cannot be written as the sum of 3 squares.
2023 is a multiple of 7 whose sum of digits is equal to 7 (
A063416).
2023 is the smallest of three consecutive numbers each divisible by a square (
A070258).
2023 is the remainder when 7 to the 7th power is divided by 7! (
A063709).