81474987 is an odd 8-digits composite number following 81474986
and preceding 81474988 . In scientific notation, it is written as 8.1474987 × 10^7.
The sum of its digits is 48. It has a total of 4 prime factors and 12 positive divisors.
There are 49378560 positive integers (up to 81474987) that are relatively prime to 81474987.
81474987 has 12 divisors, whose sum is 119407400
The reverse of 81474987 is 78947418
Previous prime number is 11
Is Prime? no Number parity odd Number length 8 Sum of Digits 48 Digital Root 3
Name
eighty-one million four hundred seventy-four thousand nine hundred eighty-seven
Scientific notation
8.1474987 × 10^7
Engineering notation
8.1474987 × 10^6
Prime Factorization
3 × 11 × 11 × 224449
Composite number
ω Distinct Factors
3 Total number of distinct prime factors
Ω Total Factors
4 Total number of prime factors
rad Radical
7406817 Product of the distinct prime numbers
The prime factorization of 81474987 is 3 × 11 × 11 × 224449.
Since it has a total of 4 prime factors.
3 , 4 , 30 , 56 , 266 , 281 , 4976 , 3865 , 94293 , 75903 , 55033 , 959476 , 1812015 , 9279540 , 64060717 , 53542666 , 156598074 , 664384923 , 9231590622 , 2480613906
n×2
162949974
n×3
244424961
n×4
325899948
n×5
407374935
n÷2
40737493.5
n÷3
27158329
n÷3
20368746.75
n÷5
16294997.4
n2
6638173506650169
n3
5.4084510015807E+23
n4
4.4065347504392E+31
n5
3.5902236150708E+39
2 √n9026.349594382
3 √n433.5189637954
4 √n95.007102862797
5 √n38.212447932027
1 , 3 , 11 , 33 , 121 , 363 , 224449 , 673347 , 2468939 , 7406817 , 27158329 , 81474987
12 divisors
τ Total Divisors
12 Total number of the positive divisors of n
σ Sum of Divisors
1 Sum of all the positive divisors of n
s Aliquot Sum
-81474986 Sum of the proper positive divisors of n
A Arithmetic Mean
0.083333333333333 Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G Geometric Mean
1 Returns the nth root of the product of n divisors
H Harmonic Mean
12 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 81474987 can be divided by 12 positive divisors.
The sum of these divisors (counting 81474987) is 1, the average is 0.083333333333333.
Base
System
Value
2
Binary
100110110110011010110101011
3
Ternary
12200022100200010
4
Quaternary
10312303112223
5
Quinary
131324144422
6
Senary
12030143003
8
Octal
466632653
10
Decimal
81474987
12
Duodecimal
23351a63
16
Hexadecimal
4db35ab
20
Vigesimal
1594797
36
Base36
1ciai3
md5
bdfdb48283f2b7be4fde042198548d93
sha1
df3fe1823798efbd54828b3de702f46c663ff182
sha256
4f5e725035b9495cc10d9d68bfe0c2fe9eb1ecf5360ed3297ab9fff0796e45ce
sha512
6416cbc5c143a205b87b261d128af96fca08d20091d72cc7ba4986f4eba52f4810de63a1d7a3db8d2134c64eab26864283edb7e5ea6061224fd8a2493a90b375
ripemd-160
39d41106fea85c182b5efd6bf3380c8f4de7d676
Diameter
162949974
Circumference
511922441.22105
Area
2.0854437121747E+16
Volume
2.2654866578488E+24
Surface area
8.3417748486986E+16
Circumference
511922441.22105
Perimeter
325899948
Area
6638173506650169
Diagonal
115223031.60957
Surface area
39829041039901014
Volume
5.4084510015807E+23
Space diagonal
141118817.03001
Perimeter
244424961
Area
2.8744134457439E+15
Altitude
70559408.515007
Surface area
2.8744134457439E+15
Volume
6.3739206315548E+22
Height
38407677.203191