general_fact: 17123 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 17123 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 17123 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: November 17th is the day in 1990 that Fugendake, part of the Mount Unzen volcanic complex, Nagasaki prefecture, Japan becomes active again and erupts.