DCCCXXIII

DCCCXXIII is the Roman numeral for the number 823. It is formed by adding the values of D (500) + CCC (300) + XX (20) + III (3). This representation uses additive notation and does not employ subtractive forms such as IV or IX.

In mathematics, 823 is a prime number, having no divisors other than 1 and itself. It is odd and not a multiple of 5, and it has no prime factors less than or equal to 23, which confirms its primality.

In other numeral systems, 823 can be written as 0x337 in hexadecimal, 1100110111 in binary, and 1467 in octal. These representations illustrate how the same integer is expressed across different positional numeral systems.

The term DCCCXXIII may appear in contexts that use Roman numerals, such as historical timelines, inscriptions, or ceremonial numbering. As a calendar year, 823 CE falls in the early ninth century, a period within the broader scope of the early medieval era in Europe.