Fatto generale: 5977 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 5977 is a boring number.
Trivia: 5977 is an unremarkable number.
Data storica: May 12th is the day in 1981 that Francis Hughes starves to death in the Maze Prison in a Republican campaign for political prisoner status to be granted to Provisional IRA prisoners.