As character names:

U+1DE9 COMBINING LATIN SMALL LETTER BETA character (ᷩ)

As raw characters:

ᷩ

As a string of HTML entities:

ᷩ

Decoder output:

Byte number 1 is decimal 225, hex 0xE1, octal \341, binary 11100001
This is the first byte of a 3 byte sequence.

Byte number 2 is decimal 183, hex 0xB7, octal \267, binary 10110111
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 169, hex 0xA9, octal \251, binary 10101001
This is continuation byte 2, expecting 0 more.

U+1DE9	COMBINING LATIN SMALL LETTER BETA