Fatto generale: 189 is the atomic number of an element temporarily called Unoctennium.
Fatto matematico: 189 is a centered cube number.
Trivia: 189 is the number of irregular verbs in the English language (from "abide" to "write").
Data storica: July 7th is the day in 1954 that Elvis Presley made his radio debut when WHBQ Memphis played his first recording for Sun Records, "That's All Right.