CLXIX

CLXIX is the Roman numeral for the number 169. It is formed by the characters C (100), LX (60), and IX (9), yielding 100 + 60 + 9 = 169. In Roman numerals, CLXIX represents additive notation with a subtractive pair (IX).

In mathematics, 169 is a perfect square, equal to 13 squared. It is a composite number with divisors 1, 13, and 169, and it is the square of a prime. This makes it a notable example of a square of a prime within number theory contexts.

Historically, 169 CE denotes a year in the Roman era. It falls during the reign of Marcus Aurelius and Lucius Verus and was a period marked by military activity along the Danube frontier and ongoing campaigns related to the Marcomannic Wars.

In computing and encoding, the decimal value 169 corresponds to the Unicode code point U+00A9, the copyright symbol ©, in ISO-8859-1 and Unicode character sets. This connection between a numeric value and a common symbol is sometimes noted in discussions of character encoding.

Beyond its primary numeric meaning, CLXIX may appear as a designation in various catalogs, models, or classifications in specialized domains. However, there is no single widely recognized entity or concept universally known by the name CLXIX.