81723894 (number)

81723894 is an even 8-digits composite number following 81723893 and preceding 81723895. In scientific notation, it is written as 8.1723894 × 10^7. The sum of its digits is 42. It has a total of 4 prime factors and 16 positive divisors. There are 23086272 positive integers (up to 81723894) that are relatively prime to 81723894.

Interesting facts

Basic properties

Name

Name eighty-one million seven hundred twenty-three thousand eight hundred ninety-four

Notation

Scientific notation 8.1723894 × 10^7
Engineering notation 8.1723894 × 10^6

Prime Factorization of 81723894

Prime Factorization 2 × 21 × 89 × 21863

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81723894
Product of the distinct prime numbers

The prime factorization of 81723894 is 2 × 21 × 89 × 21863. Since it has a total of 4 prime factors.

Most popular turbo-numbers

5, 10, 68, 61, 966, 767, 8412, 5486, 8449, 85444, 765894, 629312, 6903059, 7727728, 70381909, 83443318, 64827557, 437950335, 8678593753, 1429400179

Basic calculations (n = 81723894)

Multiplication

n×y
n×2 163447788
n×3 245171682
n×4 326895576
n×5 408619470

Division

n÷y
n÷2 40861947
n÷3 27241298
n÷3 20430973.5
n÷5 16344778.8

Exponentiation

ny
n2 6678794850523236
n3 5.4581712241191E+23
n4 4.4606300655376E+31
n5 3.6454005864921E+39

Nth Root

y√n
2√n 9040.1268796406
3√n 433.95998342702
4√n 95.079581823021
5√n 38.235767344473

Divisors of 81723894

1, 2, 21, 42, 89, 178, 1869, 3738, 21863, 43726, 459123, 918246, 1945807, 3891614, 40861947, 81723894

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 -81723893
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 81723894 can be divided by 16 positive divisors. The sum of these divisors (counting 81723894) is 1, the average is 0.0625.

Base conversion 81723894

Base System Value
2 Binary 100110111110000000111110110
3 Ternary 12200210000002220
4 Quaternary 10313300013312
5 Quinary 131410131034
6 Senary 12035343210
8 Octal 467600766
10 Decimal 81723894
12 Duodecimal 23451b06
16 Hexadecimal 4df01f6
20 Vigesimal 15af9ee
36 Base36 1cnmk6

Cryptographic Hash Functions

md5 c971742ac8696b6e1ae20361edb27cf0
sha1 5c440c245e3f901af8f9331fcadc4ca9d80cf08b
sha256 61c1cf25301f1ba833fa5137d1ab281c5073758b08d04277c6665b3991ed40c7
sha512 1578f107bdb28fe0766176224aa317ae6f64c356434a22ceda1ed68d5c9bda58e8bfca865f9e5d58830026b447f68ef8c1eac832d0749b286bef3ba2141465c4
ripemd-160 38cc5b03f875b87781891854f7fa26b432054f95

81723894 as geometric shapes

Circle

Radius = n
Diameter 163447788
Circumference 513486370.0263
Area 2.0982052837237E+16

Sphere

Radius = n
Volume 2.2863134159637E+24
Surface area 8.3928211348949E+16
Circumference 513486370.0263

Square

Length = n
Perimeter 326895576
Area 6678794850523236
Diagonal 115575039.26474

Cube

Length = n
Surface area 40072769103139416
Volume 5.4581712241191E+23
Space diagonal 141549936.60037

Equilateral Triangle

Length = n
Perimeter 245171682
Area 2.8920030036089E+15
Altitude 70774968.300187

Triangular Pyramid

Length = n
Surface area 2.8920030036089E+15
Volume 6.4325164757531E+22
Height 38525013.088247