Hecho general: 9204 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 9204 is a boring number.
Trivia: 9204 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fecha histórica: March 13th is the day in 1988 that the Seikan Tunnel, the longest undersea tunnel in the world, opens between Aomori and Hakodate, Japan.