Second to last, and thus, a real one-off: 3^3-3^0=2^2+3^2+4^2 - a prime, even a twin prime, though this month without its twin ... singular, so to speak.
Sorry, maths trivia and word play again, I'll save the last treat for tomorrow ;)
M.
P.S. The "nickel" thing was in fact "28" - the number...