DCXCVII

DCXCVII is a Roman numeral representing the number 697. It is formed by combining the symbols D (500), C (100), X (10), C (100), V (5), and I (1) in a way that adds up to 697. The value is computed as 600 (DC) plus 90 (XC, a subtractive pair meaning 100 minus 10) plus 7 (VII). Thus DCXCVII equals 697.

In historical usage, Roman numerals were used for dates, enumerations of rulers, and sections of texts. DCXCVII could appear as a year in inscriptions or documents to denote 697 CE, though modern writing generally uses Arabic numerals. The notation also serves as an example of subtractive notation, where certain pairs such as XC reduce the value of the following symbol.

Numerical properties of 697 include its status as a composite number, with factors 17 and 41. This makes 697 non-prime, having divisors other than 1 and itself. In the context of Roman numerals, DCXCVII demonstrates how hundreds, tens with subtractive notation, and units combine to form three-digit values in a compact symbolic form.