| Base 10 | 191 (3 digits) | ||
| Digit Sum: 11 | Digital Root: 2 | sad | |
| Base 2 | 0b10111111 (8 digits) | ||
| Digit Sum: 0b111 | Digital Root: 0b1 | always happy | |
| Base 8 | 0277 (3 digits) | ||
| Digit Sum: 020 | Digital Root: 02 | sad | |
| Base 16 | 0xbf (2 digits) | ||
| Digit Sum: 0x1a | Digital Root: 0xb | sad | |
More about this number at Positiv Integers and Number Empire.
The number is a prime
It is a Sophie Germain Prime since 383 is prime
It is a Twin prime for 193.
It is a Sexy prime for 197.
| In HTML this number represents this color: | 
 ⇧↑⇧↑⇧↑ #0000BF ⇩↓⇩↓⇩↓  | 
As Unicode codepoint (since version 1.1) this number represents this character:¿ INVERTED QUESTION MARK in Latin_1_Sup (Source: https://www.unicode.org/Public/UCD/latest/ucdxml/ucd.all.grouped.zip); HTML: ¿
In the work of Johann Sebastian Bach BWV 191 is Gloria in excelsis deo
The number appears at position 1944 of the decimal digits of π surrounded by
1237137869609563643719172874677646575739624 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: 712.366ms; cpu: 85.1540000000002ms)