U+0444 "ф" Cyrillic Small Letter Ef Unicode Character

U+0444 "ф" Cyrillic Small Letter Ef is a lowercase letter used in the Cyrillic script, representing the voiceless labiodental fricative sound /f/. It corresponds to the uppercase form "Ф" (U+0424) and is a direct descendant of the Greek letter phi, though its shape more closely resembles the Latin letter "f" without the crossbar. In modern Russian, Ukrainian, Bulgarian, and other Cyrillic-based alphabets, it appears primarily in words of foreign origin, technical terms, or borrowed vocabulary, as native Slavic words rarely contain the /f/ sound. Its numeric value in the early Cyrillic numeral system was 500.

General Properties

Code Point	U+0444
Version Added	1.1
Name	Cyrillic Small Letter Ef
Block	Cyrillic
General Category	Lowercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right

Encodings

HTML Decimal Encoding	ф
HTML Hex Encoding	ф
UTF-8 Encoding	0xD1 0x84
UTF-16 Encoding	0x0444
UTF-32 Encoding	0x00000444
C/C++/Java Escape	\u0444

Unicode Properties

NFC Quick Check	Yes
NFD Quick Check	Yes
NFKC Quick Check	Yes
NFKD Quick Check	Yes
Numeric Type	None
Numeric Value	NaN
Line Break	Alphabetic
East Asian Width	Ambiguous
Lowercase	Yes
Simple Uppercase Code Point	"Ф" U+0424 Cyrillic Capital Letter Ef
Simple Titlecase Code Point	"Ф" U+0424 Cyrillic Capital Letter Ef
Uppercase Code Point	"Ф" U+0424 Cyrillic Capital Letter Ef
Titlecase Code Point	"Ф" U+0424 Cyrillic Capital Letter Ef
Cased	Yes
Changes When Casemapped	Yes
Changes When Titlecased	Yes
Changes When Uppercased	Yes
Script	Cyrillic
Script Extensions	Cyrillic
Indic Syllabic Category	Other
ID Start	Yes
XID Start	Yes
ID Continue	Yes
XID Continue	Yes
Alphabetic	Yes
Vertical Orientation	Rotated
Grapheme Base	Yes
Grapheme Cluster Break	Other
Word Break	Alphabetic letter
Sentence Break	Lower