Hecho general: 97773 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 97773 is a boring number.
Trivia: 97773 is an unremarkable number.
Fecha histórica: September 10th is the day in 1967 that the people of Gibraltar vote to remain a British dependency rather than becoming part of Spain.