The Roman numeral CDXCVII corresponds to the Arabic number 497.
CDXCVII = 497
Symbols are written and read from left to right, from highest to lowest.
If number CDXCVII is within to text or sentence it should be read in its equivalent in Arabic numbers, in this case 497.
CDXCVI is number 496
CDXCVIII is number 498
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