This character is a Decimal Number and is mainly used in the N’Ko script. The codepoint has the decimal value 9.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it is written from right to left. When changing direction it is not mirrored. This number joins with other adjacent letters and numbers to form a word. U+07C9 forms a number with similar characters, which prevents a line break inside it.
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
1993
UTF-8
DF 89
UTF-16
07 C9
UTF-32
00 00 07 C9
URL-Quoted
%DF%89
HTML hex reference
߉
Wrong windows-1252 Mojibake
߉
Encoding: GB18030 (hex bytes)
81 31 AD 37
RFC 5137
\u'07C9'
Bash and Zsh inside echo -e
\u07C9
C and C++
\u07C9
C#
\u07C9
CSS
\0007C9
Excel
=UNICHAR(1993)
Go
\u07C9
JavaScript
\u07C9
Modern JavaScript since ES6
\u{7c9}
JSON
\u07C9
Java
\u07C9
Lua
\u{7C9}
Matlab
char(1993)
Perl
"\x{7C9}"
PHP
\u{7c9}
PostgreSQL
U&'\07C9'
PowerShell
`u{7C9}
Python
\u07C9
Ruby
\u{7c9}
Rust
\u{7c9}
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