9 (number)

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8 9 10
−1 0 1 2 3 4 5 6 7 8 9
Cardinalnine
Ordinal9th
(ninth)
Numeral systemnonary
Factorization32
Roman numeralIX
Unicode symbol(s)Ⅸ, ⅸ
Greek prefixennea-
Latin prefixnona-
Binary10012
Ternary1003
Quaternary214
Quinary145
Senary136
Octal118
Duodecimal912
Hexadecimal916
Vigesimal920
Base 36936
Amharic
Arabicl٩
Urdu
Armenian numeralԹ
Bengali
Chinese/Japanese
/Korean numeral
九 (jiu)
玖 (formal writing)
Devanāgarī (Nao)
Greek numeralθ´
Hebrew numeralט (Tet)
Tamil numeral
Khmer
Telugu numeral
Thai numeral
Pronunciation of the number 9

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.