81738891 (number)

81738891 is an odd 8-digits composite number following 81738890 and preceding 81738892. In scientific notation, it is written as 8.1738891 × 10^7. The sum of its digits is 45. It has a total of 5 prime factors and 24 positive divisors. There are 49907520 positive integers (up to 81738891) that are relatively prime to 81738891.

Interesting facts

Basic properties

Name

Name eighty-one million seven hundred thirty-eight thousand eight hundred ninety-one

Notation

Scientific notation 8.1738891 × 10^7
Engineering notation 8.1738891 × 10^6

Prime Factorization of 81738891

Prime Factorization 3 × 3 × 13 × 131 × 5333

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 27246297
Product of the distinct prime numbers

The prime factorization of 81738891 is 3 × 3 × 13 × 131 × 5333. Since it has a total of 5 prime factors.

Most popular turbo-numbers

4, 3, 52, 78, 765, 75, 3579, 8643, 60624, 15569, 230814, 379961, 7715323, 9758388, 57733573, 71823754, 396606129, 613510055, 4371136682, 8483241849

Basic calculations (n = 81738891)

Multiplication

n×y
n×2 163477782
n×3 245216673
n×4 326955564
n×5 408694455

Division

n÷y
n÷2 40869445.5
n÷3 27246297
n÷3 20434722.75
n÷5 16347778.2

Exponentiation

ny
n2 6681246301909881
n3 5.4611766321596E+23
n4 4.4639052146784E+31
n5 3.6487466177693E+39

Nth Root

y√n
2√n 9040.9563100371
3√n 433.98652686695
4√n 95.083943492249
5√n 38.237170556406

Divisors of 81738891

1, 3, 9, 13, 39, 117, 131, 393, 1179, 1703, 5109, 5333, 15327, 15999, 47997, 69329, 207987, 623961, 698623, 2095869, 6287607, 9082099, 27246297, 81738891

24 divisors

τ Total Divisors 24
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81738890
Sum of the proper positive divisors of n
A Arithmetic Mean 0.041666666666667
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 24
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81738891 can be divided by 24 positive divisors. The sum of these divisors (counting 81738891) is 1, the average is 0.041666666666667.

Base conversion 81738891

Base System Value
2 Binary 100110111110011110010001011
3 Ternary 12200210202200100
4 Quaternary 10313303302023
5 Quinary 131411121031
6 Senary 12035540443
8 Octal 467636213
10 Decimal 81738891
12 Duodecimal 2345a723
16 Hexadecimal 4df3c8b
20 Vigesimal 15ah74b
36 Base36 1cny4r

Cryptographic Hash Functions

md5 951443a0ba95db8bb1e9ced47ceb0226
sha1 d2c32d0f7ef20e07558a526b9a614b1cd5a18905
sha256 34fb0bae84d5d05be525046b40ffdcf6c0fd20a16055d59468548e592220969f
sha512 2c467ac0e7ddf86619c7847cbb12754a806b1f2b6ecea6ff0e68397919bc1155e73c5c77e1c7f2e2e3945020f4fceb803a506b52c4645b6b8e04e579707c7637
ripemd-160 30bea9ea6c024a3dce8a12bab62a23d4096e9451

81738891 as geometric shapes

Circle

Radius = n
Diameter 163477782
Circumference 513580598.95635
Area 2.0989754298904E+16

Sphere

Radius = n
Volume 2.2875723183399E+24
Surface area 8.3959017195616E+16
Circumference 513580598.95635

Square

Length = n
Perimeter 326955564
Area 6681246301909881
Diagonal 115596248.22554

Cube

Length = n
Surface area 40087477811459286
Volume 5.4611766321596E+23
Space diagonal 141575912.16633

Equilateral Triangle

Length = n
Perimeter 245216673
Area 2.8930645131974E+15
Altitude 70787956.083167

Triangular Pyramid

Length = n
Surface area 2.8930645131974E+15
Volume 6.436058383096E+22
Height 38532082.741845