CMXXIII

CMXXIII is a Roman numeral that represents the number 923. It combines the subtractive notation CM for 900 with XX for 20 and III for 3, giving 900 + 20 + 3 = 923.

In the Roman numeral system, a smaller numeral placed before a larger one indicates subtraction; CM is the standard representation for 900, as 100 placed before 1000. The following XX and III are added to complete the total value. This arrangement follows common conventions of modern Roman numerals, where subtractive forms are used to shorten certain numbers.

Usage of CMXXIII typically appears in contexts that employ Roman numerals, such as historical inscriptions, clock faces, page numbering in some books, or as a date marker. When used as a year, 923 CE would be written as CMXXIII. While the system has various possible forms for larger numbers, CMXXIII is the accepted standard representation for 923 in formal Roman numeral usage.

See also: Roman numerals, numeral systems, subtractive notation.