The Roman numeral "DCLXCVII" represents the number 697. In this numeral, "D" stands for 500, "C" for 100, "L" for 50, "X" for 10, "V" for 5, and "II" for 2. When combined, these values add up to 697. Roman numerals are a numeral system originating from ancient Rome. They use combinations of letters from the Latin alphabet to signify values. This system was widely used throughout the Roman Empire and is still used today in various contexts, such as clock faces and the naming of monarchs and popes.