101101001

101101001 is a binary numeral consisting of nine bits. In decimal, it equals 361, since the value is 1×2^8 + 0×2^7 + 1×2^6 + 1×2^5 + 0×2^4 + 1×2^3 + 0×2^2 + 0×2^1 + 1×2^0 = 361. In hexadecimal, it is 0x169, and in octal, it is 0o551. As a 9-bit pattern, it fits within word sizes that use nine bits rather than the standard eight or sixteen.

The bitstring has five ones and four zeros. It is not a palindrome, since reversing the sequence yields 100101101, which is different from the original. If interpreted as an 8-bit value by taking the least significant eight bits, 101101001 becomes 01101001, which corresponds to the ASCII character 'i' in standard ASCII encoding. This illustrates how a nine-bit pattern can relate to commonly used 8-bit encodings when portions of the pattern are extracted.

In practical contexts, nine-bit patterns like 101101001 may appear in specialized data formats, error-detecting schemes, or vintage systems that employ non-byte-aligned word sizes. When mapped to larger numeric schemes, it represents the number 361, or, as a square number, 19 squared. Overall, 101101001 is a simple yet illustrative example of a non-power-of-two binary length with straightforward decimal and hexadecimal equivalents.