DCXLIX

DCXLIX is the Roman numeral representation of the number 649. The Roman numeral system uses letters to denote numerical values. In this case, D represents 500, C represents 100, XL represents 40, and IX represents 9. Therefore, DCXLIX is formed by adding these values together: 500 + 100 + 40 + 9 = 649. The system relies on both additive and subtractive principles. For example, when a smaller numeral precedes a larger one, as in XL (40) and IX (9), it indicates subtraction (50 - 10 = 40 and 10 - 1 = 9). Conversely, when numerals are arranged in descending order of value, as with D and C, their values are added. DCXLIX is a relatively straightforward combination of these Roman numeral components.