This character is a Decimal Number and is mainly used in the Khmer script. The codepoint has the decimal value 8.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it is written from left to right. When changing direction it is not mirrored. This number joins with other adjacent letters and numbers to form a word. U+17E8 forms a number with similar characters, which prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
8 (eight) is the natural number following 7 and preceding 9.
Representations
System
Representation (click value to copy)
Nº
6120
UTF-8
E1 9F A8
UTF-16
17 E8
UTF-32
00 00 17 E8
URL-Quoted
%E1%9F%A8
HTML hex reference
៨
Wrong windows-1252 Mojibake
៨
Encoding: GB18030 (hex bytes)
81 34 D0 34
RFC 5137
\u'17E8'
Bash and Zsh inside echo -e
\u17E8
C and C++
\u17E8
C#
\u17E8
CSS
\0017E8
Excel
=UNICHAR(6120)
Go
\u17E8
JavaScript
\u17E8
Modern JavaScript since ES6
\u{17e8}
JSON
\u17E8
Java
\u17E8
Lua
\u{17E8}
Matlab
char(6120)
Perl
"\x{17E8}"
PHP
\u{17e8}
PostgreSQL
U&'\17E8'
PowerShell
`u{17E8}
Python
\u17E8
Ruby
\u{17e8}
Rust
\u{17e8}
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