Il numero romano MMMCMIII nel sistema decimale vale: 3903.
MMMCMIII in latino si scrive tria milia nongenti tres,
mentre in italiano tremilanovecentotré.
MMMDCCCLXXXIV, MMMDCCCLXXXV, MMMDCCCLXXXVI, MMMDCCCLXXXVII, MMMDCCCLXXXVIII, MMMDCCCLXXXIX, MMMDCCCXC, MMMDCCCXCI, MMMDCCCXCII, MMMDCCCXCIII, MMMDCCCXCIV, MMMDCCCXCV, MMMDCCCXCVI, MMMDCCCXCVII, MMMDCCCXCVIII, MMMDCCCXCIX, MMMCM, MMMCMI, MMMCMII, MMMCMIV, MMMCMV, MMMCMVI, MMMCMVII, MMMCMVIII, MMMCMIX, MMMCMX, MMMCMXI, MMMCMXII, MMMCMXIII, MMMCMXIV, MMMCMXV, MMMCMXVI, MMMCMXVII, MMMCMXVIII, MMMCMXIX, MMMCMXX, MMMCMXXI, MMMCMXXII