Il numero romano MMMCDXLVII nel sistema decimale vale: 3447.
MMMCDXLVII in latino si scrive tria milia quadringenti quadraginta septem,
mentre in italiano tremilaquattrocentoquarantasette.
MMMCDXXVIII, MMMCDXXIX, MMMCDXXX, MMMCDXXXI, MMMCDXXXII, MMMCDXXXIII, MMMCDXXXIV, MMMCDXXXV, MMMCDXXXVI, MMMCDXXXVII, MMMCDXXXVIII, MMMCDXXXIX, MMMCDXL, MMMCDXLI, MMMCDXLII, MMMCDXLIII, MMMCDXLIV, MMMCDXLV, MMMCDXLVI, MMMCDXLVIII, MMMCDXLIX, MMMCDL, MMMCDLI, MMMCDLII, MMMCDLIII, MMMCDLIV, MMMCDLV, MMMCDLVI, MMMCDLVII, MMMCDLVIII, MMMCDLIX, MMMCDLX, MMMCDLXI, MMMCDLXII, MMMCDLXIII, MMMCDLXIV, MMMCDLXV, MMMCDLXVI