וַיִּהְיוּ֙ כָּל־יְמֵ֣י מְתוּשֶׁ֔לַח תֵּ֤שַׁע וְשִׁשִּׁים֙ שָׁנָ֔ה וּתְשַׁ֥ע מֵא֖וֹת שָׁנָ֑ה וַיָּמֹֽת׃ (פ)
And all the days of Methuselah were nine hundred sixty and nine years; and he died.
Read kabbalistic (mystical) interpretation of Genesis 5:27: and classical mystical sources.