Il numero romano MMMDCCXXIII nel sistema decimale vale: 3723.
MMMDCCXXIII in latino si scrive tria milia septingenti viginti tres,
mentre in italiano tremilasettecentoventitré.
MMMDCCIV, MMMDCCV, MMMDCCVI, MMMDCCVII, MMMDCCVIII, MMMDCCIX, MMMDCCX, MMMDCCXI, MMMDCCXII, MMMDCCXIII, MMMDCCXIV, MMMDCCXV, MMMDCCXVI, MMMDCCXVII, MMMDCCXVIII, MMMDCCXIX, MMMDCCXX, MMMDCCXXI, MMMDCCXXII, MMMDCCXXIV, MMMDCCXXV, MMMDCCXXVI, MMMDCCXXVII, MMMDCCXXVIII, MMMDCCXXIX, MMMDCCXXX, MMMDCCXXXI, MMMDCCXXXII, MMMDCCXXXIII, MMMDCCXXXIV, MMMDCCXXXV, MMMDCCXXXVI, MMMDCCXXXVII, MMMDCCXXXVIII, MMMDCCXXXIX, MMMDCCXL, MMMDCCXLI, MMMDCCXLII