The Ultimate 163 (number) - American History Information Guide and Reference

163 is the natural number following one hundred sixty-two and preceding one hundred sixty-four.


Ordinal	One hundred [and] sixty-three
Cardinal	163rd
Factorization	prime number
Roman numeral	CLX
Binary	10100011
Hexadecimal	A3

Given 163, the Mertens function returns 0. Multiplied by -1, it is a Heegner number.

163 figures in an approximation of π, in which $\pi \approx {2^9 \over 163}$ . Also, it appears in the Ramanujan constant , in which $e^{\pi \sqrt{163}}$ almost equals the integer 262537412640768744. Martin Gardner famously asserted that this identity was exact in a 1975 April Fools' hoax in Scientific American; in fact the value is 262537412640768743.99999999999925007259...

163 is a strictly non-palindromic number, it is not palindromic in any base from base 2 to base 161.

One hundred sixty-three is also:

The year AD 163 or 163 BC.

Categories: Integers

Last updated: 10-15-2005 13:40:42

Your American History Reference Guide! - 163 (number)

163 (number)

Your American History Reference Guide!
- 163 (number)