Hecho matemático: 2973 is a value of n for which n and 5n together use each digit 1-9 exactly once.
Trivia: 2973 is an uninteresting number.
Fecha histórica: February 20th is the day in 1988 that the Nagorno-Karabakh Autonomous Oblast votes to secede from Azerbaijan and join Armenia, triggering the Nagorno-Karabakh War.