math_fact: 2834 is a composite number n that divides the (n+1)^{st} Fibonacci number.
trivia: 2834 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: October 4th is the day in 1636 that the Swedish Army defeats the armies of Saxony and the Holy Roman Empire at the Battle of Wittstock.