Fatto generale: 189 is the number of irregular verbs in the English language (from "abide" to "write").
Fatto matematico: 189 is a Kaprekar constant in base 2.
Trivia: 189 is the rank of Brazil in population density.
Data storica: July 7th is the day in 1997 that the Turkish Armed Forces withdraw from northern Iraq after assisting the Kurdistan Democratic Party in the Iraqi Kurdish Civil War.