| Base 10 | 409 (3 digits) | ||
| Digit Sum: 13 | Digital Root: 4 | happy | |
| Base 2 | 0b110011001 (9 digits) | ||
| Digit Sum: 0b101 | Digital Root: 0b1 | always happy | |
| Base 8 | 0631 (3 digits) | ||
| Digit Sum: 012 | Digital Root: 03 | sad | |
| Base 16 | 0x199 (3 digits) | ||
| Digit Sum: 0x13 | Digital Root: 0x4 | sad | |
More about this number at Positiv Integers and Number Empire.
| In HTML this number represents this color: | 
 ⇧↑⇧↑⇧↑ #000199 ⇩↓⇩↓⇩↓  | 
As Unicode codepoint (since version 1.1) this number represents this character:ƙ LATIN SMALL LETTER K WITH HOOK in Latin_Ext_B (Source: https://www.unicode.org/Public/UCD/latest/ucdxml/ucd.all.grouped.zip); HTML: ƙ
In the work of Johann Sebastian Bach BWV 409 is Seelenbräutigam, Jesu, Gottes Lamm
The number appears at position 339 of the decimal digits of π surrounded by
1748815209209628292540917153643678925903600 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: 708.911ms; cpu: 85.5920000000001ms)