9 (number)
Nine is the Arabic number which comes after 8 and before 10. It is an odd number, and is the highest single-digit number. It is also a square number. In Roman numerals, nine can be written as IX.
| ||||
|---|---|---|---|---|
| Cardinal | nine | |||
| Ordinal | 9th (ninth) | |||
| Numeral system | nonary | |||
| Factorization | 32 | |||
| Greek numeral | Θ´ | |||
| Roman numeral | IX | |||
| Unicode symbol(s) | Ⅸ, ⅸ | |||
| Greek prefix | ennea- | |||
| Latin prefix | nona- | |||
| Binary | 10012 | |||
| Ternary | 1003 | |||
| Quaternary | 214 | |||
| Quinary | 145 | |||
| Senary | 136 | |||
| Octal | 118 | |||
| Duodecimal | 912 | |||
| Hexadecimal | 916 | |||
| Vigesimal | 920 | |||
| Base 36 | 936 | |||
| Amharic | ፱ | |||
| Arabicl | ٩ | |||
| Urdu |  | |||
| Armenian numeral | Թ | |||
| Bengali | ৯ | |||
| Chinese/Japanese /Korean numeral | 九 (jiu) 玖 (formal writing) | |||
| Devanāgarī | ९ (Nao) | |||
| Greek numeral | θ´ | |||
| Hebrew numeral | ט (Tet) | |||
| Tamil numeral | ௯ | |||
| Khmer | ៩ | |||
| Telugu numeral | ౯ | |||
| Thai numeral | ๙ | |||
Mathematics
The number nine (9) takes the shape of an upside-down six (6), is a multiple of 3, and the third square number after 4.
Nine is also a composite number, having the factors: 1, 3 and 9 itself.
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