81799487 is an odd 8-digits composite number following 81799486
and preceding 81799488 . In scientific notation, it is written as 8.1799487 × 10^7.
The sum of its digits is 53. It has a total of 4 prime factors and 16 positive divisors.
There are 63447840 positive integers (up to 81799487) that are relatively prime to 81799487.
81799487 has 16 divisors, whose sum is 102451200
The reverse of 81799487 is 78499718
Previous prime number is 229
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 53
Digital Root 8
Name
eighty-one million seven hundred ninety-nine thousand four hundred eighty-seven
Scientific notation
8.1799487 × 10^7
Engineering notation
8.1799487 × 10^6
Prime Factorization
7 × 11 × 229 × 4639
Composite number
ω
Distinct Factors
4
Total number of distinct prime factors
Ω
Total Factors
4
Total number of prime factors
rad
Radical
81799487
Product of the distinct prime numbers
The prime factorization of 81799487 is 7 × 11 × 229 × 4639.
Since it has a total of 4 prime factors.
9 , 10 , 52 , 4 , 23 , 395 , 1060 , 5488 , 50996 , 80742 , 694227 , 750844 , 6386224 , 1620221 , 78773936 , 58024232 , 266550946 , 370610653 , 1852261332 , 8355452687
n×2
163598974
n×3
245398461
n×4
327197948
n×5
408997435
n÷2
40899743.5
n÷3
27266495.666667
n÷3
20449871.75
n÷5
16359897.4
n2
6691156073463169
n3
5.4733313424622E+23
n4
4.4771569599443E+31
n5
3.6622914254192E+39
2 √n
9044.3068833383
3 √n
434.09374368635
4 √n
95.101560888023
5 √n
38.242838195857
1 , 7 , 11 , 77 , 229 , 1603 , 2519 , 4639 , 17633 , 32473 , 51029 , 357203 , 1062331 , 7436317 , 11685641 , 81799487
16 divisors
τ
Total Divisors
16
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-81799486
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.0625
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
16
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 81799487 can be divided by 16 positive divisors.
The sum of these divisors (counting 81799487) is 1, the average is 0.0625.
Base
System
Value
2
Binary
100111000000010100100111111
3
Ternary
12200220211210122
4
Quaternary
10320002210333
5
Quinary
131420040422
6
Senary
12041125155
8
Octal
470024477
10
Decimal
81799487
12
Duodecimal
234897bb
16
Hexadecimal
4e0293f
20
Vigesimal
15b4ie7
36
Base36
1cp8vz
md5
b77983604fa4ffaddd64a2b58e0b9944
sha1
d7abb1852bdabde013d0af585abc3d02f4392fa1
sha256
d6ff63b7bf47329589a04a991018dadab0e3bb385d2b09f105abe1351b4d2912
sha512
a7ba9138d1e1c052778cdd60fff65da4b1f4f689cc1c3d6639490498f9581979b6450edd813c868dd8753826012da69487bf25a43a71c4d13802bf17fc75fa35
ripemd-160
c5947949901b39a70e3a5ccdedd65779a6e89f0e
Diameter
163598974
Circumference
513961334.85323
Area
2.1020886764415E+16
Volume
2.2926636714856E+24
Surface area
8.4083547057658E+16
Circumference
513961334.85323
Perimeter
327197948
Area
6691156073463169
Diagonal
115681943.91056
Surface area
40146936440779014
Volume
5.4733313424622E+23
Space diagonal
141680867.51707
Perimeter
245398461
Area
2.8973555701528E+15
Altitude
70840433.758535
Surface area
2.8973555701528E+15
Volume
6.4503828465598E+22
Height
38560647.970187