Hecho general: 91726 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 91726 is an unremarkable number.
Trivia: 91726 is an uninteresting number.
Fecha histórica: February 19th is the day in 1649 that the Second Battle of Guararapes takes place, effectively ending Dutch colonization efforts in Brazil.