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2009 in Roman Numerals

2009 in Roman numerals is MMIX. It breaks down as MM + IX, which adds up to 2000 + 9 = 2009.

  • Roman numeral
    MMIX
  • Lowercase
    mmix
  • Breakdown
    MM + IX
  • In words
    two thousand nine
  • Binary
    11111011001
  • Hexadecimal
    7D9

How to write 2009 in Roman numerals

Roman numerals are built place by place, from the largest value to the smallest. For 2009 the places are 2000 (thousands), 9 (ones).

  1. Write 2000 as MM.
  2. Write 9 as IX.

Joined together, MM + IX gives MMIX.

2009 digit by digit

PlaceValueNumeralRule used
thousands2000MMthe symbol repeated twice
ones9IXsubtractive: one symbol before the ten symbol

Check MMIX by reading it back

Reading MMIX from left to right and adding the pieces: MM = 2000, IX = 9. Together that is 2000 + 9 = 2009, so MMIX and 2009 match.

Mistakes to avoid with MMIX

  • Do not write the 4s and 9s additively. 2009 uses subtractive pairs (IX for 9), not strings like IIII or VIIII.
  • Never repeat a symbol more than three times in a row. When a fourth would be needed, the subtractive form takes over.
  • Only I, X and C may be placed before a larger symbol to subtract, so MMIX never contains forms such as VX or LC.
  • Read MMIX as one number, not letter by letter: add the values left to right, except where a smaller symbol sits before a larger one.

Facts about the number 2009

  • 2009 is an odd number and composite, with prime factors 72 x 41.
  • In binary 2009 is 11111011001 and in hexadecimal it is 7D9.
  • Written out, 2009 is "two thousand nine".
  • The digits of 2009 add up to 11.
  • As a year, 2009 was a common year with 365 days and belongs to the 21st century.

Where you will see 2009 in Roman numerals

The year 2009 is represented by MMIX on the copyright screens of video releases from that time. Distributors use Roman numerals for these dates to follow established media conventions and to present the legal information in a stylized, formal manner.

Numbers near 2009

NumberRoman numeral
2007MMVII
2008MMVIII
2009MMIX
2010MMX
2011MMXI

FAQ

What is 2009 in Roman numerals?

2009 is written MMIX in Roman numerals. It is built from MM (2000), IX (9).

How do you write 2009 in lowercase Roman numerals?

Lowercase Roman numerals use the same rules, so 2009 is mmix. Lowercase is common for page numbers in a book's preface and for outline levels.

How do I convert any number to Roman numerals?

Split the number into thousands, hundreds, tens and ones, write each part with the symbols I, V, X, L, C, D and M, then join them from largest to smallest. Or paste it into the Roman numeral converter, which also converts back.

More roman numerals