MCCLXXXIX

MCCLXXXIX is the Roman numeral designation for the number 1289. It is formed by adding M (1000) to CC (200), to L (50), to XXX (30), and to IX (9). The numeral uses subtractive notation for nine (IX) and combines additive components to produce a single standard form for 1289.

In contemporary references, MCCLXXXIX may appear in inscriptions, chronicles, or editions that date events or items using Roman numerals. When used as a year, MCCLXXXIX denotes the year 1289 CE in the Julian calendar, placing it in the late 13th century. The era saw ongoing feudal and political developments across Europe and associated regions, though events specific to that year vary by source and locale.

Mathematically, 1289 is an odd number and is prime. Its prime nature is a property of the integer itself, independent of its Roman representation. The form MCCLXXXIX also illustrates how Roman numerals encode values through a mix of additive and subtractive notation, with IX for 9 and XXX for 30 contributing to the overall value alongside M, CC, and L.