general_fact: 5177 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 5177 is the number of labeled bipartite graphs with 6 vertices.
trivia: 5177 is a boring number.
historical_date: March 4th is the day in 1918 that the USS Cyclops (AC-4) departs from Barbados and is never seen again, presumably lost with all hands in the Bermuda Triangle.