9999 (number)

← 9998 9999 10000 →
Cardinalnine thousand nine hundred ninety-nine
Ordinal9999th
(nine thousand nine hundred ninety-ninth)
Factorization32 × 11 × 101
Greek numeral,ΘϠϞΘ´
Roman numeralMXCMXCIX, or IXCMXCIX
Binary100111000011112
Ternary1112011003
Senary1141436
Octal234178
Duodecimal595312
Hexadecimal270F16

9999 is the natural number following 9998 and preceding 10000.

9999 is an auspicious number in Chinese folklore. Many estimations of the rooms contained in the Forbidden City point to 9999. Chinese tomb contracts often involved being buried with 9999 coins, a practice related to Joss paper, as it was believed the dead would need that amount to buy the burial plot from the Earth goddess.[1]

9999 is also the emergency telephone number in Oman.[2]

  1. ^ Valerie Hansen, Negotiating Daily Life in Traditional China: How Ordinary People Used Contracts, 600-1400 (Yale University Press, 1995)
  2. ^ http://www.rop.gov.om/english/regionalinfo.asp Archived 2012-08-25 at the Wayback Machine