Il numero romano MMMDCCCXCIX nel sistema decimale vale: 3899.
MMMDCCCXCIX in latino si scrive tria milia octingenti nonaginta novem,
mentre in italiano tremilaottocentonovantanove.
MMMDCCCLXXX, MMMDCCCLXXXI, MMMDCCCLXXXII, MMMDCCCLXXXIII, MMMDCCCLXXXIV, MMMDCCCLXXXV, MMMDCCCLXXXVI, MMMDCCCLXXXVII, MMMDCCCLXXXVIII, MMMDCCCLXXXIX, MMMDCCCXC, MMMDCCCXCI, MMMDCCCXCII, MMMDCCCXCIII, MMMDCCCXCIV, MMMDCCCXCV, MMMDCCCXCVI, MMMDCCCXCVII, MMMDCCCXCVIII, MMMCM, MMMCMI, MMMCMII, MMMCMIII, MMMCMIV, MMMCMV, MMMCMVI, MMMCMVII, MMMCMVIII, MMMCMIX, MMMCMX, MMMCMXI, MMMCMXII, MMMCMXIII, MMMCMXIV, MMMCMXV, MMMCMXVI, MMMCMXVII, MMMCMXVIII