111011001

111011001 is a binary numeral consisting of nine bits. As a binary string, it can be used to represent numeric values or data in digital systems, depending on the encoding and context.

Interpreted as an unsigned binary number, 111011001 equals 473 in decimal. If interpreted as a 9-bit two's complement value, it represents -39. This follows from the representation of negative numbers in two's complement form, where the pattern with the leftmost bit set to 1 encodes a negative value.

Bit-length and ranges are often noted to understand possible interpretations. The nine-bit unsigned range is 0 to 511, while the nine-bit signed two's complement range is -256 to 255. The pattern ends in 1, so it is an odd number (473 as unsigned).

In other encodings, the same bit pattern can have different meanings. For example, if the lower eight bits are considered (11011001), that byte corresponds to 0xD9 in hexadecimal, which maps to various extended ASCII or code page characters depending on the system. However, as a standalone nine-bit value, 111011001 has no standard ASCII meaning.

Context matters: 111011001 may appear in discussions of binary representations, memory dumps, test vectors for digital logic, or instruction encodings, where the exact interpretation depends on bit width and signedness.

See also: binary numeral system; two's complement; unsigned integer; bit width.