Il numero romano MCCXCIX nel sistema decimale vale: 1299.
MCCXCIX in latino si scrive mille ducenti nonaginta novem,
mentre in italiano milleduecentonovantanove.
MCCLXXX, MCCLXXXI, MCCLXXXII, MCCLXXXIII, MCCLXXXIV, MCCLXXXV, MCCLXXXVI, MCCLXXXVII, MCCLXXXVIII, MCCLXXXIX, MCCXC, MCCXCI, MCCXCII, MCCXCIII, MCCXCIV, MCCXCV, MCCXCVI, MCCXCVII, MCCXCVIII, MCCC, MCCCI, MCCCII, MCCCIII, MCCCIV, MCCCV, MCCCVI, MCCCVII, MCCCVIII, MCCCIX, MCCCX, MCCCXI, MCCCXII, MCCCXIII, MCCCXIV, MCCCXV, MCCCXVI, MCCCXVII, MCCCXVIII