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189 (number) : ウィキペディア英語版 | 189 (number)
189 (one hundred () eighty-nine) is the natural number following 188 and preceding 190. ==In mathematics==
* 189 is an odd number * 189 is a centered cube number * 189 is a composite number * 189 is a deficient number, as 131 is less than 189 * 189 is a heptagonal number * 189 is a lucky number * 189 is an ulam number * 189 is a 64-gonal number * 189 is a Kaprekar constant in base 2 * Binary: 10111101, a palindromic number that remains unchanged upon reversal of its numbers * 189 is 33 × 7 * 189 can written as sum of two cubes in two ways: 43 + 53 and 63 + (-3)3 (If you want these cubes to be positive, it is 1729) * Divisors of 189: 1, 3, 7, 9, 21, 27, 63, 189
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