Il numero romano MCXCIX nel sistema decimale vale: 1199.
MCXCIX in latino si scrive mille centum nonaginta novem,
mentre in italiano millecentonovantanove.
MCLXXX, MCLXXXI, MCLXXXII, MCLXXXIII, MCLXXXIV, MCLXXXV, MCLXXXVI, MCLXXXVII, MCLXXXVIII, MCLXXXIX, MCXC, MCXCI, MCXCII, MCXCIII, MCXCIV, MCXCV, MCXCVI, MCXCVII, MCXCVIII, MCC, MCCI, MCCII, MCCIII, MCCIV, MCCV, MCCVI, MCCVII, MCCVIII, MCCIX, MCCX, MCCXI, MCCXII, MCCXIII, MCCXIV, MCCXV, MCCXVI, MCCXVII, MCCXVIII