### About the Number 491 (four hundred ninety-one)

On 29 March 2017, MathBabbler read Millennials: Instagram the Most Narcissistic Social Media Platform. MathBabbler is Baby Boomer who uses Instagram and on 29 March 2017 he had 491 posts and 58 followers.

```MathBabbler Number Analyst (MBNA) output:
=========================================
491 is natural, counting, whole, integer
491 is odd (not even)
491 is not extremely odd
491 proper divisors are: 1,
491 has 1 proper divisors
491 is deficient (sum of divisors is 1; ratio: 0.00203666)
491 is unhappy
491 is a Squarefree Number
491 is prime (not composite)
...Cousin prime with 487
...Sophie Germain prime with 983
...Truman Gerald (p+30) prime with 521
...Truman Gerald (p-30) prime with 461
...OEIS:002145 (4n+3; n=122)
...Eisenstein (3n-1; n=164)
491 is the sum of 15 consecutive primes
491 = 7 + 11 + 13 + 17 + 19 + 23 + 29 + 31 + 37 + 41 + 43 + 47 + 53 + 59 + 61
491 in octal is 0753
491 in binary is 111101011 (is odious)
491 nearest square numbers: -7...38 (484...529 [23])
sqrt(491) = 22.1585
ln(491) = 6.19644
log(491) = 2.69108
491! is 6.71624e+1109
491 is 156.29 Pi years
491 is 24 score and 11 years
491 written as a Roman numeral is CDXCI
491 is 246^2 - 245^2 and 246 + 245 = 491
491 is a multiple of 1 & it contains a 1 (A011531)
__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
491 reciprocal is 0.0020366598778004073319755600814663951120162932790224032586558044806517311608961303462321792260692464358452138492871690427698574338085539714867617107942973523421588594704684317718940936863543788187372708757637474541751527494908350305498981670061099796334012219959266802443991853360488798370672097759674134419551934826883910386965376782077393075356415478615071283095723014256619144602851323828920570264765784114052953156822810590631364562118126272912423625254582484725050916496945010183299389
remainders:
1,10,100,18,180,327,324,294,485,431,382,383,393,2,20,200,36,360,163,157,97,479,371,273,275,295,4,40,400,72,229,326,314,194,467,251,55,59,99,8,80,309,144,458,161,137,388,443,11,110,118,198,16,160,127,288,425,322,274,285,395,22,220,236,396,32,320,254,85,359,153,57,79,299,44,440,472,301,64,149,17,170,227,306,114,158,107,88,389,453,111,128,298,34,340,454,121,228,316,214,176,287,415,222,256,105,68,189,417,242,456,141,428,352,83,339,444,21,210,136,378,343,484,421,282,365,213,166,187,397,42,420,272,265,195,477,351,73,239,426,332,374,303,84,349,53,39,390,463,211,146,478,361,173,257,115,168,207,106,78,289,435,422,292,465,231,346,23,230,336,414,212,156,87,379,353,93,439,462,201,46,460,181,337,424,312,174,267,215,186,387,433,402,92,429,362,183,357,133,348,43,430,372,283,375,313,184,367,233,366,223,266,205,86,369,253,75,259,135,368,243,466,241,446,41,410,172,247,15,150,27,270,245,486,441,482,401,82,329,344,3,30,300,54,49,490,481,391,473,311,164,167,197,6,60,109,108,98,489,471,291,455,131,328,334,394,12,120,218,216,196,487,451,91,419,262,165,177,297,24,240,436,432,392,483,411,182,347,33,330,354,103,48,480,381,373,293,475,331,364,203,66,169,217,206,96,469,271,255,95,459,171,237,406,132,338,434,412,192,447,51,19,190,427,342,474,321,264,185,377,333,384,403,102,38,380,363,193,457,151,37,370,263,175,277,315,204,76,269,235,386,423,302,74,249,35,350,63,139,408,152,47,470,281,355,113,148,7,70,209,126,278,325,304,94,449,71,219,226,296,14,140,418,252,65,159,117,188,407,142,438,452,101,28,280,345,13,130,318,234,376,323,284,385,413,202,56,69,199,26,260,145,468,261,155,77,279,335,404,112,138,398,52,29,290,445,31,310,154,67,179,317,224,276,305,104,58,89,399,62,129,308,134,358,143,448,61,119,208,116,178,307,124,258,125,268,225,286,405,122,238,416,232,356,123,248,25,250,45,450,81,319,244,476,341,464,221,246,5,50,9,90,409,162,147,488,461,191,437,442,1
```

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 30 March 2017