| Base 10 | 13 (2 digits) | ||
| Digit Sum: 4 | Digital Root: 4 | happy | |
| Base 2 | 0b1101 (4 digits) | ||
| Digit Sum: 0b11 | Digital Root: 0b1 | always happy | |
| Base 8 | 015 (2 digits) | ||
| Digit Sum: 06 | Digital Root: 06 | sad | |
| Base 16 | 0xd (1 digit) | ||
| Digit Sum: 0xd | Digital Root: 0xd | sad | |
More about this number at Positiv Integers and Number Empire.
The number is a prime
It is a Twin prime for 11.
It is a Cousin prime for 17.
It is a Sexy prime for 7 and 19.
| In HTML this number represents this color: |
⇧↑⇧↑⇧↑ #00000D ⇩↓⇩↓⇩↓ |
In the work of Johann Sebastian Bach BWV 13 is Meine Seufzer, meine Tränen
The number appears at position 110 of the decimal digits of π surrounded by
534211706798214808651328230664709384460955 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: 852.4ms; cpu: 68.9419999999998ms)