XXXIX

XXXIX is the Roman numeral that represents the integer 39. It is formed by combining the symbols XXX, which stands for 30, and IX, which denotes 9. In this arrangement the subtractive notation used in IX expresses the value 9, while the XXX portion adds 30, yielding 39 in total.

Roman numerals are still used today for specific stylistic and organizational purposes. XXXIX may appear to denote a sequence item such as a chapter, volume, edition, or a numbering of events, and it can be used to indicate a year in contexts that employ Roman dating. For example, 39 CE (or 39 AD) could be written as XXXIX in some historical notes, while larger years in the thousands are typically written with additional symbols (for instance, 1939 is MCMXXXIX).

In modern culture, XXXIX appears in branding, labels, and titles where Roman numerals are preferred for effect or tradition. It is also encountered in lists, comparisons, or enumerations that rely on Roman numbering rather than Arabic digits. While specialized uses vary by field, XXXIX generally functions as a shorthand label for the 39th item in a sequence or the year 39 in contexts that employ Roman numerals.

See also: Roman numerals, subtractive notation, list numbering.