684

Properties by base:

More about this number at Positiv Integers and Number Empire.

The number is not a prime.

Its 5 (3 unique) factors are:
2² = 4
3² = 9
19

Its 18 divisors are:
1
2
3
4
6
9
12
18
19
36
38
57
76
114
171
228
342
684
Its aliquote sum is:
1136
makeing it a abundant number.

As Unicode codepoint (since version 3.0) this number represents this character:ʬ LATIN LETTER BILABIAL PERCUSSIVE in IPA_Ext (Source: https://ucdapi.org/unicode/latest/codepoint/dec/684); HTML: ʬ

In the work of Johann Sebastian Bach BWV 684 is Christ unser Herr zum Jordan kam (à 2 Clav. et Ped., Canto fermo in Pedale)

The number appears at position 653 of the decimal digits of π surrounded by
7789609173637178721468440901224953430146549 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: 910.994ms; cpu: 102.999000000001ms)