Il numero romano MMMDCCCIII nel sistema decimale vale: 3803.
MMMDCCCIII in latino si scrive tria milia octingenti tres,
mentre in italiano tremilaottocentotré.
MMMDCCLXXXIV, MMMDCCLXXXV, MMMDCCLXXXVI, MMMDCCLXXXVII, MMMDCCLXXXVIII, MMMDCCLXXXIX, MMMDCCXC, MMMDCCXCI, MMMDCCXCII, MMMDCCXCIII, MMMDCCXCIV, MMMDCCXCV, MMMDCCXCVI, MMMDCCXCVII, MMMDCCXCVIII, MMMDCCXCIX, MMMDCCC, MMMDCCCI, MMMDCCCII, MMMDCCCIV, MMMDCCCV, MMMDCCCVI, MMMDCCCVII, MMMDCCCVIII, MMMDCCCIX, MMMDCCCX, MMMDCCCXI, MMMDCCCXII, MMMDCCCXIII, MMMDCCCXIV, MMMDCCCXV, MMMDCCCXVI, MMMDCCCXVII, MMMDCCCXVIII, MMMDCCCXIX, MMMDCCCXX, MMMDCCCXXI, MMMDCCCXXII