The glyph is not a composition. Its width in East Asian texts is determined by its context. It can be displayed wide or narrow. In bidirectional text it is written from left to right. When changing direction it is not mirrored. The word that U+039C 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:
Mu (; uppercase Μ, lowercase μ; Ancient Greek μῦ[mŷː], Greek: μι or μυ—both [mi]) is the twelfth letter of the Greek alphabet, representing the voiced bilabial nasal IPA:[m]. In the system of Greek numerals it has a value of 40. Mu was derived from the Egyptian hieroglyphic symbol for water, which had been simplified by the Phoenicians and named after their word for water, to become 𐤌img (mem). Letters that derive from mu include the Roman M and the Cyrillic М, though the lowercase resembles a small Latin U (u).
Representations
System
Representation (click value to copy)
Nº
924
UTF-8
CE 9C
UTF-16
03 9C
UTF-32
00 00 03 9C
URL-Quoted
%CE%9C
HTML hex reference
Μ
Wrong windows-1252 Mojibake
Μ
HTML named entity
Μ
Encoding: BIG5 (hex bytes)
A3 4F
Encoding: BIG5HKSCS (hex bytes)
A3 4F
Encoding: CP737 (hex bytes)
8B
Encoding: CP869 (hex bytes)
B7
Encoding: CP875 (hex bytes)
53
Encoding: CP932 (hex bytes)
83 AA
Encoding: CP949 (hex bytes)
A5 CC
Encoding: CP950 (hex bytes)
A3 4F
Encoding: CP1253 (hex bytes)
CC
Encoding: EUC_JP (hex bytes)
A6 AC
Encoding: EUC_JIS_2004 (hex bytes)
A6 AC
Encoding: EUC_JISX0213 (hex bytes)
A6 AC
Encoding: EUC_KR (hex bytes)
A5 CC
Encoding: GB2312 (hex bytes)
A6 AC
Encoding: GBK (hex bytes)
A6 AC
Encoding: GB18030 (hex bytes)
A6 AC
Encoding: HZ (hex bytes)
7E 7B 26 2C 7E 7D
Encoding: ISO2022_JP (hex bytes)
1B 24 42 26 2C 1B 28 42
Encoding: ISO2022_JP_1 (hex bytes)
1B 24 42 26 2C 1B 28 42
Encoding: ISO2022_JP_2 (hex bytes)
1B 24 42 26 2C 1B 28 42
Encoding: ISO2022_JP_2004 (hex bytes)
1B 24 42 26 2C 1B 28 42
Encoding: ISO2022_JP_3 (hex bytes)
1B 24 42 26 2C 1B 28 42
Encoding: ISO2022_JP_EXT (hex bytes)
1B 24 42 26 2C 1B 28 42
Encoding: ISO2022_KR (hex bytes)
1B 24 29 43 0E 25 4C 0F
Encoding: ISO8859_7 (hex bytes)
CC
Encoding: JOHAB (hex bytes)
DB 5C
Encoding: MAC_GREEK (hex bytes)
BB
Encoding: SHIFT_JIS (hex bytes)
83 AA
Encoding: SHIFT_JIS_2004 (hex bytes)
83 AA
Encoding: SHIFT_JISX0213 (hex bytes)
83 AA
Encoding: CP875 (hex bytes)
53
LATEX
M
Adobe Glyph List
Mu
digraph
M*
RFC 5137
\u'039C'
Bash and Zsh inside echo -e
\u039C
C and C++
\u039C
C#
\u039C
CSS
\00039C
Excel
=UNICHAR(924)
Go
\u039C
JavaScript
\u039C
Modern JavaScript since ES6
\u{39c}
JSON
\u039C
Java
\u039C
Lua
\u{39C}
Matlab
char(924)
Perl
"\x{39C}"
PHP
\u{39c}
PostgreSQL
U&'\039C'
PowerShell
`u{39C}
Python
\u039C
Ruby
\u{39c}
Rust
\u{39c}
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