This character is a Other Number and is commonly used, that is, in no specific script. The codepoint represents the digit9.
The glyph is a subscript version of the glyph Digit Nine. It has no designated width in East Asian texts. In bidirectional text it is written as European number from left to right. When changing direction it is not mirrored. The word that U+2089 forms with similar adjacent characters prevents a line break inside it.
El Wikipedia tiene la siguiente información acerca de este punto de código:
9 (nine) is the natural number following 8 and preceding 10.
Representaciones
Sistema
Representación (click value to copy)
N.º
8329
UTF-8
E2 82 89
UTF-16
20 89
UTF-32
00 00 20 89
URL-Quoted
%E2%82%89
HTML hex reference
₉
Mojibake mal de windows-1252
₉
Codificación: GB18030 (hexadecimales bytes)
81 36 AF 37
AGL: Latin-4
nine.inferior
AGL: Latin-5
nine.inferior
Adobe Glyph List
nineinferior
dígrafo
9s
RFC 5137
\u'2089'
Bash and Zsh inside echo -e
\u2089
C and C++
\u2089
C#
\u2089
CSS
\002089
Excel
=UNICHAR(8329)
Go
\u2089
JavaScript
\u2089
Modern JavaScript since ES6
\u{2089}
JSON
\u2089
Java
\u2089
Lua
\u{2089}
Matlab
char(8329)
Perl
"\x{2089}"
PHP
\u{2089}
PostgreSQL
U&'\2089'
PowerShell
`u{2089}
Python
\u2089
Ruby
\u{2089}
Rust
\u{2089}
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