Il numero romano MMDCCCXCIX nel sistema decimale vale: 2899.
MMDCCCXCIX in latino si scrive duo milia octingenti nonaginta novem,
mentre in italiano duemilaottocentonovantanove.
MMDCCCLXXX, MMDCCCLXXXI, MMDCCCLXXXII, MMDCCCLXXXIII, MMDCCCLXXXIV, MMDCCCLXXXV, MMDCCCLXXXVI, MMDCCCLXXXVII, MMDCCCLXXXVIII, MMDCCCLXXXIX, MMDCCCXC, MMDCCCXCI, MMDCCCXCII, MMDCCCXCIII, MMDCCCXCIV, MMDCCCXCV, MMDCCCXCVI, MMDCCCXCVII, MMDCCCXCVIII, MMCM, MMCMI, MMCMII, MMCMIII, MMCMIV, MMCMV, MMCMVI, MMCMVII, MMCMVIII, MMCMIX, MMCMX, MMCMXI, MMCMXII, MMCMXIII, MMCMXIV, MMCMXV, MMCMXVI, MMCMXVII, MMCMXVIII