It is nothing. That is not a roman numeral!
You have already given it in Roman numerals
In Roman numerals, MMMD is MMMD. In Hindu-Arabic numerals, it is 3500.
They are meaningless because they are an invalid arrangement of Roman numerals
Under today's rules the Roman numerals CMXLVII represent 947.
399
190
1,915
1955
365
1910
48
1907