Fatto generale: 117 is the atomic number of a recently discovered element temporarily called ununseptium.
Fatto matematico: 117 is the smallest possible value of the longest edge in a Heronian Tetrahedron.
Trivia: 117 is the substitute for the number 17, which is considered unlucky in Italy.
Data storica: April 26th is the day in 1986 that a nuclear reactor accident occurs at the Chernobyl Nuclear Power Plant in the Soviet Union (now Ukraine), creating the world's worst nuclear disaster.