90,000
90,000 (ninety thousand) is the natural number following 89,999 and preceding 90,001. It is the sum of the cubes of the first 24 positive integers, and is the square of 300.
| ||||
|---|---|---|---|---|
| Cardinal | ninety thousand | |||
| Ordinal | 90000th (ninety thousandth) | |||
| Factorization | 24 × 32 × 54 | |||
| Greek numeral | ||||
| Roman numeral | XC | |||
| Binary | 101011111100100002 | |||
| Ternary | 111201101003 | |||
| Senary | 15324006 | |||
| Octal | 2576208 | |||
| Duodecimal | 4410012 | |||
| Hexadecimal | 15F9016 | |||
Selected numbers in the range 90,000–99,999
- 90,625 = the only five-digit automorphic number: 906252 = 8212890625[1]
- 91,125 = 453
- 91,144 = Fine number[2]
- 93,312 = Leyland number: 66 + 66.[3] Also a 3-smooth number.
- 94,249 = palindromic square: 3072
- 94,932 = Leyland number: 75 + 57[3]
- 95,121 = Kaprekar number: 951212 = 9048004641; 90480 + 04641 = 95121[4]
- 96,557 = Markov number: 52 + 64662 + 965572 = 3 × 5 × 6466 × 96557[5]
- 97,336 = 463
- 98,304 = 3-smooth number
- 99,066 = largest number whose square uses all of the decimal digits once: 990662 = 9814072356. It is also strobogrammatic in decimal.
- 99,991 = largest five-digit prime number
- 99,999 = repdigit, Kaprekar number: 999992 = 9999800001; 99998 + 00001 = 99999[4]
References
- "Sloane's A003226 : Automorphic numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-16.
- Sloane, N. J. A. (ed.). "Sequence A000957". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2022-06-01.
- "Sloane's A076980 : Leyland numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-16.
- "Sloane's A006886 : Kaprekar numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-16.
- "Sloane's A002559 : Markoff (or Markov) numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-16.
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