23

Properties by base:

Base 1023 (2 digits)
Digit Sum: 5
Digital Root: 5 happy
Base 20b10111 (5 digits)
Digit Sum: 0b100
Digital Root: 0b1 always happy
Base 8027 (2 digits)
Digit Sum: 011
Digital Root: 02 sad
Base 160x17 (2 digits)
Digit Sum: 0x8
Digital Root: 0x8 sad

More about this number at Positiv Integers and Number Empire.

The number is a prime

It is a Sophie Germain Prime since 47 is prime

It is a Safe Prime since 11 is prime

It is a Cousin prime for 19.

It is a Sexy prime for 17 and 29.

In HTML this number represents this color:  
#000017
 

In the work of Johann Sebastian Bach BWV 23 is Du wahrer Gott und Davids Sohn [Köthener Fassung in c]

The number appears at position 16 of the decimal digits of π surrounded by
3.1415926535897932384626433832795028841 Source: The Pi-Search Page

Computations done with Math::BigInt 1.999811 and Math::Pari 2.030523 based on PARI/GP 2.11.3 (elapsed: 971.427ms; cpu: 87.6730000000006ms)


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