Typewriter-style monospace number 4, a fixed-width code-like digit used for stylized text.
U+1D7F9MATHEMATICAL MONOSPACE DIGIT THREEU+1D7FBMATHEMATICAL MONOSPACE DIGIT FIVEU+1D7F8MATHEMATICAL MONOSPACE DIGIT TWOU+1D7FCMATHEMATICAL MONOSPACE DIGIT SIXU+1D7F7MATHEMATICAL MONOSPACE DIGIT ONEU+1D7FDMATHEMATICAL MONOSPACE DIGIT SEVENU+1D7F6MATHEMATICAL MONOSPACE DIGIT ZEROU+1D7FEMATHEMATICAL MONOSPACE DIGIT EIGHTU+1D7F5MATHEMATICAL SANS-SERIF BOLD DIGIT NINEU+1D7FFMATHEMATICAL MONOSPACE DIGIT NINEU+1D7F4MATHEMATICAL SANS-SERIF BOLD DIGIT EIGHTU+1D7F3MATHEMATICAL SANS-SERIF BOLD DIGIT SEVEN997 characters in the Mathematical Alphanumeric Symbols Unicode block, from number 992.