81723785 is an odd 8-digits composite number following 81723784
and preceding 81723786 . In scientific notation, it is written as 8.1723785 × 10^7.
The sum of its digits is 41. It has a total of 4 prime factors and 16 positive divisors.
There are 54863040 positive integers (up to 81723785) that are relatively prime to 81723785.
81723785 has 16 divisors, whose sum is 115214400
The reverse of 81723785 is 58732718
Previous prime number is 11
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 41
Digital Root 5
Name
eighty-one million seven hundred twenty-three thousand seven hundred eighty-five
Scientific notation
8.1723785 × 10^7
Engineering notation
8.1723785 × 10^6
Prime Factorization
5 × 13 × 11 × 114299
Composite number
ω
Distinct Factors
4
Total number of distinct prime factors
Ω
Total Factors
4
Total number of prime factors
rad
Radical
81723785
Product of the distinct prime numbers
The prime factorization of 81723785 is 5 × 13 × 11 × 114299.
Since it has a total of 4 prime factors.
7 , 3 , 71 , 71 , 998 , 80 , 2509 , 9532 , 62017 , 8542 , 836766 , 476227 , 956509 , 4549683 , 6607951 , 79573804 , 515601674 , 616196086 , 515054967 , 6227695235
n×2
163447570
n×3
245171355
n×4
326895140
n×5
408618925
n÷2
40861892.5
n÷3
27241261.666667
n÷3
20430946.25
n÷5
16344757
n2
6678777034726225
n3
5.458149384489E+23
n4
4.4606062679586E+31
n5
3.645376276123E+39
2 √n
9040.1208509621
3 √n
433.95979049422
4 √n
95.079550119687
5 √n
38.235757145006
1 , 5 , 11 , 13 , 55 , 65 , 143 , 715 , 114299 , 571495 , 1257289 , 1485887 , 6286445 , 7429435 , 16344757 , 81723785
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
-81723784
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 81723785 can be divided by 16 positive divisors.
The sum of these divisors (counting 81723785) is 1, the average is 0.0625.
Base
System
Value
2
Binary
100110111110000000110001001
3
Ternary
12200202222221212
4
Quaternary
10313300012021
5
Quinary
131410130120
6
Senary
12035342505
8
Octal
467600611
10
Decimal
81723785
12
Duodecimal
23451a35
16
Hexadecimal
4df0189
20
Vigesimal
15af995
36
Base36
1cnmh5
md5
9f768bddf8c9ea2c86a481eee0d752b0
sha1
cfc9c42257d26f234f3b5b977233c6bccaf078df
sha256
ce79b652038ff34bf891c9a79680bc64d95e4c05ec20316948beb92f25fc637c
sha512
cde5ec9c9238e27599a663e1e7236aad2720c8606b5f15b14500c5c15c3e7b714089e30264079f46c1eb7c987ef23eccbd9e0f62053c1d3a84b499fd0f1f3c62
ripemd-160
886ccf6e9f77f7d2c9795f045117a319db8d814d
Diameter
163447570
Circumference
513485685.1591
Area
2.098199686726E+16
Volume
2.2863042678009E+24
Surface area
8.3927987469041E+16
Circumference
513485685.1591
Perimeter
326895140
Area
6678777034726225
Diagonal
115574885.11546
Surface area
40072662208357350
Volume
5.458149384489E+23
Space diagonal
141549747.80684
Perimeter
245171355
Area
2.8919952891425E+15
Altitude
70774873.903418
Surface area
2.8919952891425E+15
Volume
6.4324907375023E+22
Height
38524961.705154