Fatto generale: 86423 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 86423 is an uninteresting number.
Trivia: 86423 is a boring number.
Data storica: August 13th is the day in 1968 that Alexandros Panagoulis attempts to assassinate the Greek dictator Colonel Georgios Papadopoulos in Varkiza, Athens.