general_fact: 47646 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 47646 is a boring number.
trivia: 47646 is a boring number.
historical_date: June 13th is the day in 1525 that Martin Luther marries Katharina von Bora, against the celibacy rule decreed by the Roman Catholic Church for priests and nuns.