99 (number)
99 (ninety-nine) is the natural number following 98 and preceding 100.
| ||||
|---|---|---|---|---|
| Cardinal | ninety-nine | |||
| Ordinal | 99th (ninety-ninth) | |||
| Factorization | 32 × 11 | |||
| Divisors | 1, 3, 9, 11, 33, 99 | |||
| Greek numeral | ϞΘ´ | |||
| Roman numeral | XCIX | |||
| Binary | 11000112 | |||
| Ternary | 102003 | |||
| Senary | 2436 | |||
| Octal | 1438 | |||
| Duodecimal | 8312 | |||
| Hexadecimal | 6316 | |||
| Chinese/Japanese /Korean numeral | 九十九 | |||
In mathematics
99 is:
- a Kaprekar number[1]
- a lucky number
- a palindromic number
- the ninth repdigit
- the sum of the cubes of three consecutive integers: 99 = 23 + 33 + 43
- the sum of the sums of the divisors of the first 11 positive integers.[2]
- the highest two digit number in decimal.
In music
- "99", a song by the band Toto on the Hydra album.
- "99 Bottles of Beer", a counting song.
- "99 Luftballons", a German-language song by the band Nena.
- "99 Problems", a song by Jay-Z on The Black Album.
- "99 Ways to Die", a song by Megadeth on the Hidden Treasures EP.
In other fields
- The atomic number of einsteinium, an actinide.
- ".99" is frequently used as a price ender in pricing.
- 99, the jersey number of Wayne Gretzky, since permanently retired
References
- "Sloane's A006886 : Kaprekar numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28.
- Sloane, N. J. A. (ed.). "Sequence A024916 (sum_{k=1..n} sigma(k) where sigma(n) = sum of divisors of n)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.