12629 is already in Hindu-Arabic numerals
The Roman numerals LXVII=67 in Hindu Arabic numerals.
The Roman numerals of XX are the equivalent of 20 in Hindu-Arabic numerals
The Roman numerals of CCX are the equivalent of 210 in Hindu-Arabic numerals.
The Roman numerals of DCCC are the equivalent of 800 in Hindu-Arabic numerals
The Roman numerals for 64 are ILXV (65-1) or LXIIII (64) and they are not LXIV. So your question is: What is the cube root of LXIIII in Arabic numerals? The answer is 4 which is IIII or IV in Roman numerals.
Hindu Arabic numerals are the ones we use. 39 is already in Hindu-Arabic numerals.
12629 is already in Hindu-Arabic numerals
The Roman numerals LXVII=67 in Hindu Arabic numerals.
The Roman numerals of XX are the equivalent of 20 in Hindu-Arabic numerals
The Roman numerals of CCX are the equivalent of 210 in Hindu-Arabic numerals.
The Roman numerals of DCCC are the equivalent of 800 in Hindu-Arabic numerals
In Hindu-Arabic numerals, DCLXII would be 662.
437 is already in Hindu-Arabic numerals
The Roman numerals of XXVIII are the equivalent of 28 in Hindu-Arabic numerals
dcccxiii in Roman numerals is equivalent to 813 in Hindu-Arabic numerals.
12629 is already expressed in Hindu-Arabic numerals