Il numero romano MMMDCCCXXIII nel sistema decimale vale: 3823.
MMMDCCCXXIII in latino si scrive tria milia octingenti viginti tres,
mentre in italiano tremilaottocentoventitré.
MMMDCCCIV, MMMDCCCV, MMMDCCCVI, MMMDCCCVII, MMMDCCCVIII, MMMDCCCIX, MMMDCCCX, MMMDCCCXI, MMMDCCCXII, MMMDCCCXIII, MMMDCCCXIV, MMMDCCCXV, MMMDCCCXVI, MMMDCCCXVII, MMMDCCCXVIII, MMMDCCCXIX, MMMDCCCXX, MMMDCCCXXI, MMMDCCCXXII, MMMDCCCXXIV, MMMDCCCXXV, MMMDCCCXXVI, MMMDCCCXXVII, MMMDCCCXXVIII, MMMDCCCXXIX, MMMDCCCXXX, MMMDCCCXXXI, MMMDCCCXXXII, MMMDCCCXXXIII, MMMDCCCXXXIV, MMMDCCCXXXV, MMMDCCCXXXVI, MMMDCCCXXXVII, MMMDCCCXXXVIII, MMMDCCCXXXIX, MMMDCCCXL, MMMDCCCXLI, MMMDCCCXLII