| Base 10 | 641 (3 digits) | ||
| Digit Sum: 11 | Digital Root: 2 | sad | |
| Base 2 | 0b1010000001 (10 digits) | ||
| Digit Sum: 0b11 | Digital Root: 0b1 | always happy | |
| Base 8 | 01201 (4 digits) | ||
| Digit Sum: 04 | Digital Root: 04 | sad | |
| Base 16 | 0x281 (3 digits) | ||
| Digit Sum: 0xb | 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 1283 is prime
It is a Twin prime for 643.
It is a Sexy prime for 647.
| In HTML this number represents this color: |
⇧↑⇧↑⇧↑ #000281 ⇩↓⇩↓⇩↓ |
As Unicode codepoint (since version 1.1) this number represents this character:ʁ LATIN LETTER SMALL CAPITAL INVERTED R in IPA_Ext (Source: https://ucdapi.org/unicode/latest/codepoint/dec/641); HTML: ʁ
In the work of Johann Sebastian Bach BWV 641 is Wenn wir in höchsten Nöten sein (à 2 Clav. et Ped.)
The number appears at position 1423 of the decimal digits of π surrounded by
8235478163600934172164121992458631503028618 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: 937.632ms; cpu: 81.3ms)