Fatto matematico: 8433 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 8433 is an uninteresting number.
Data storica: February 1st is the day in 2009 that Jóhanna Sigurðardóttir is chosen the first female Prime Minister of Iceland, becoming the first openly gay head of government in the modern world.