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— 163 —

Roman Numeral

CLXIII

Greek Numeral

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Maya Numeral

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10100011

322

243

a3

6J

163 is a Prime Number by adding the letters in the alphabet code, i.e., a = 1, b = 2, c = 3, etc

163 is Conjectured to be the largest prime that can be represented uniquely as the sum of three squares (1^2 + 9^2 + 9^2). Note that squares are allowed to be zero.

163 = 1+2×3^4.

163 is a strong prime in the sense that it is greater than the arithmetic mean of its two neighboring primes. 163 is a lucky prime.

Saudi Arabian Airlines Flight 163 caught fire at Riyadh’s International Airport en route from Karachi, Pakistan on August 19, 1980

Iraqi Airways Flight 163, en route from Baghdad’s Baghdad International Airport to Amman, Jordan, was hijacked and crashed on December 25, 1986

Given 163, the Mertens function returns 0.

163 is a strictly non-palindromic number. A strictly non-palindromic number is an integer n that is not palindromic in any numeral system with a base b in the range 2 ? b ? n ? 2. For example, the number six is written as 110 in base 2, 20 in base 3 and 12 in base 4, none of which is a palindrome—so 6 is strictly non-palindromic. The sequence of strictly non-palindromic numbers (sequence A016038 in OEIS) starts: 1, 2, 3, 4, 6, 11, 19, 47, 53, 79, 103, 137, 139, 149, 163, 167, 179, 223, 263, 269, 283, 293, …

The atomic number of an element temporarily called Unhextrium is 163.