783

783 = 3 x 3 x 3 x 29.

783 is a heptagonal number.

783 is the number of 11-ominoes that tile the plane by translation.

783³ = 480,048,687 = (48 + 00 + 48 + 687)³.

783 is 373 in base 15 and 234 in base 19.

Source: What Special About This Number?