903

903 = 3 x 7 x 43.

903 is the 42nd triangular number (the sum of all integers from 1 to 42).

To get the largest prime number of 903 decimal digits, subtract 903 from 10⁹⁰³.

903 is a number that cannot be written as a sum of three squares.


903 is a telephone area code in the state of Texas (Texarkana region).

Source: Prime Curios!