The Roman numeral MCDXXIII corresponds to the Arabic number 1423.
MCDXXIII = 1423
Symbols are written and read from left to right, from highest to lowest.
If number MCDXXIII is within to text or sentence it should be read in its equivalent in Arabic numbers, in this case 1423.
MCDXXII is number 1422
MCDXXIV is number 1424
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