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Cardinal | one hundred sixty-nine | |||
Ordinal | 169th (one hundred sixty-ninth) | |||
Factorization | 132 | |||
Divisors | 1, 13, 169 | |||
Greek numeral | ΡΞΘ´ | |||
Roman numeral | CLXIX | |||
Binary | 101010012 | |||
Ternary | 200213 | |||
Senary | 4416 | |||
Octal | 2518 | |||
Duodecimal | 12112 | |||
Hexadecimal | A916 |
169 (one hundred [and] sixty-nine) is the natural number following 168 and preceding 170.
169 is an odd number, a composite number, and a deficient number.
169 is a square number: 13 × 13 = 169, and if each number is reversed the equation is still true: 31 × 31 = 961. 144 shares this property: 12 × 12 = 144, 21 × 21 = 441.
169 is one of the few squares to also be a centered hexagonal number. [1] Like all odd squares, it is a centered octagonal number. 169 is an odd-indexed Pell number, thus it is also a Markov number, appearing in the solutions (2, 169, 985), (2, 29, 169), (29, 169, 14701), etc. 169 is the sum of seven consecutive primes: 13 + 17 + 19 + 23 + 29 + 31 + 37. 169 is a difference in consecutive cubes, equaling
169 is also:
USS Merrill (DD-976), named for Rear Admiral Aaron Stanton Merrill USN (1890–1961), was a Spruance-class destroyer that entered service with the United States Navy in 1978. Merrill served as the US Navy's test platform for the Tomahawk cruise missile. In the 1980s, the destroyer took part in Operation Earnest Will in the Persian Gulf during heightened tensions with Iran. The destroyer was decommissioned in 1998. The vessel was used as a target ship in 2003 and sunk off Hawaii in 2003.
145 is the natural number following 144 and preceding 146.
129 is the natural number following 128 and preceding 130.
131 is the natural number following 130 and preceding 132.
167 is the natural number following 166 and preceding 168.
134 is the natural number following 133 and preceding 135.
136 is the natural number following 135 and preceding 137.
173 is the natural number following 172 and preceding 174.
138 is the natural number following 137 and preceding 139.
143 is the natural number following 142 and preceding 144.
154 is the natural number following 153 and preceding 155.
181 is the natural number following 180 and preceding 182.
159 is a natural number following 158 and preceding 160.
165 is the natural number following 164 and preceding 166.
168 is the natural number following 167 and preceding 169.
161 is the natural number following 160 and preceding 162.
166 is the natural number following 165 and preceding 167.
176 is the natural number following 175 and preceding 177.
182 is the natural number following 181 and preceding 183.
625 most commonly refers to: