### About the Number 1,901 (one thousand nine hundred one)

Tau Day death day (6/28/1901). The first Tau Day of the 20th century.

```MathBabbler Number Analyst (MBNA) output:
=========================================
1901 is a natural, whole, integer
1901 is odd
1901 proper divisors are: 1,
1901 has 1 proper divisors
1901 is deficient (sum of divisors is 1; ratio: 0.000526039)
1901 is unhappy
1901 is a Squarefree Number
1901 is prime (not composite)
...Sexy prime with 1907
...Sexy Triplet prime with 1907, 1913
...Sophie Germain prime with 3803
...Truman Gerald prime with 1931
...Truman Gerald prime with 1871
...Pythagorean
...reversible prime with 1091
...Eisenstein
1901 is Arithmetic (A003601)
1901 is the sum of 11 consecutive primes
1901 = 149 + 151 + 157 + 163 + 167 + 173 + 179 + 181 + 191 + 193 + 197
1901 in octal is 03555
1901 in hexadecimal is 0x76d
1901 in binary is 11101101101 (is evil)
1901 nearest square numbers: -52...35 (1849...1936 )
sqrt(1901) = 43.6005
ln(1901) = 7.55014
log(1901) = 3.27898
1901 reciprocal is .00052603892688058916359810625986
1901! is inf
1901 is 605.107 Pi years
1901 is 95 score and 1 year
1901 written as a Roman numeral is MCMI
1901 is 951^2 - 950^2 and 951 + 950 = 1901
1901 is a multiple of 1 & it contains a 1 (A011531)
```

log11(1901) = 3.14865

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 22 March 2015 (posted 26 March 2015) 