| Property | Value |
|---|---|
| Codepoint | U+1D7D9 |
| Literal Character | 𝟙 |
| Name | MATHEMATICAL DOUBLE-STRUCK DIGIT ONE |
| Control Character | no |
| Block | Mathematical Alphanumeric Symbols |
| Subblock | Transliteration signs |
| UTF-8 byte encoding | f0 9d 9f 99 |
| UTF-16 byte encoding | d8 35 df d9 (big endian) |
| HTML Entity | 𝟙 |
| LaTeX expression | $\mathbb{1}$ |
| Perl string literal | \x{1D7D9} |