### About the Number 19,191 (nineteen thousand one hundred ninety-one)

The DJIA closed at 19,191.93 on 1 December 2016. 19,191.93 rounded down to the nearest whole number is 19,191.

```MathBabbler Number Analyst (MBNA) output:
=========================================
19191 is natural, counting, whole, integer
19191 is odd (not even)
19191 is extremely odd
19191 proper divisors are: 1,3,6397,
19191 has 3 proper divisors
19191 is deficient (sum of divisors is 6401; ratio: 0.333542)
19191 is unhappy
19191 is a Squarefree Number
19191 is composite (not prime)
19191 has the prime factors: 3*6397 (sum=6400)
19191 is semiprime (biprime or 2-almost prime)
19191 is a 6397-smooth number
19191 is undulating
19191 is palindromic
19191 is Arithmetic (A003601)
19191 in octal is 045367
19191 in binary is 100101011110111 (is evil)
19191 nearest square numbers: -147...130 (19044...19321 [139])
sqrt(19191) = 138.532
ln(19191) = 9.8622
log(19191) = 4.2831
19191 is an apocalyptic power (2^19191 contains 666)
19191! is inf
19191 is 6108.69 Pi years
19191 is 959 score and 11 years
19191 is 9596^2 - 9595^2 and 9596 + 9595 = 19191
19191 is a multiple of 1 & it contains a 1 (A011531)
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19191 reciprocal is 0.000052107758845292063988327862018654577666614558907821374602678338804648012089
```

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 02 December 2016