Mathematical Double-Struck Digit One

Group: Mathematical alphanumerics

Keywords

math-alphanumeric

About this character

Mathematical Double-Struck Digit One belongs to the Mathematical alphanumerics group and is encoded at U+1D7D9. It was added in Unicode 0.0.

Shortcode

Chat apps such as Slack, Discord and GitHub accept this shortcode instead of the character itself.

Technical codes

Code point: U+1D7D9
Hex: 1D7D9
Decimal: 120793
HTML: 𝟙
CSS: \1D7D9
JavaScript: \u{1D7D9}
Python: \U0001D7D9
UTF-8: F0 9D 9F 99

The same character is drawn differently by each operating system and font.

Questions

Why does this emoji look different on my phone?

Unicode standardises the meaning of a character, not its drawing. Apple, Google, Microsoft and Samsung each ship their own artwork, so the same code point changes shape between devices.

Does copying work everywhere?

The character is copied as plain text, so it pastes into any app that accepts text. If the receiving app has no font for it, you will see an empty box instead.