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 superscript version of the glyph Glyph for U+0039Digit 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+2079 forms with similar adjacent characters prevents a line break inside it. The glyph can be confused with one other glyph.
The Wikipedia has the following information about this codepoint:
9 (nine) is the natural number following 8 and preceding 10.
Representations
System
Representation (click value to copy)
Nº
8313
UTF-8
E2 81 B9
UTF-16
20 79
UTF-32
00 00 20 79
URL-Quoted
%E2%81%B9
HTML hex reference
⁹
Wrong windows-1252 Mojibake
â¹
Encoding: GB18030 (hex bytes)
81 36 AE 31
AGL: Latin-4
nine.superior
AGL: Latin-5
nine.superior
Adobe Glyph List
ninesuperior
digraph
9S
RFC 5137
\u'2079'
Bash and Zsh inside echo -e
\u2079
C and C++
\u2079
C#
\u2079
CSS
\002079
Excel
=UNICHAR(8313)
Go
\u2079
JavaScript
\u2079
Modern JavaScript since ES6
\u{2079}
JSON
\u2079
Java
\u2079
Lua
\u{2079}
Matlab
char(8313)
Perl
"\x{2079}"
PHP
\u{2079}
PostgreSQL
U&'\2079'
PowerShell
`u{2079}
Python
\u2079
Ruby
\u{2079}
Rust
\u{2079}
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