81687777 (number)

81687777 is an odd 8-digits composite number following 81687776 and preceding 81687778. In scientific notation, it is written as 8.1687777 × 10^7. The sum of its digits is 51. It has a total of 2 prime factors and 4 positive divisors. There are 54458516 positive integers (up to 81687777) that are relatively prime to 81687777.

Interesting facts

Basic properties

Name

Name eighty-one million six hundred eighty-seven thousand seven hundred seventy-seven

Notation

Scientific notation 8.1687777 × 10^7
Engineering notation 8.1687777 × 10^6

Prime Factorization of 81687777

Prime Factorization 3 × 27229259

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 81687777
Product of the distinct prime numbers

The prime factorization of 81687777 is 3 × 27229259. Since it has a total of 2 prime factors.

Most popular turbo-numbers

4, 5, 85, 53, 308, 970, 4204, 6641, 61306, 65210, 294122, 26425, 9984694, 5400941, 85652751, 56744825, 717393936, 688935728, 4972467566, 9519488066

Basic calculations (n = 81687777)

Multiplication

n×y
n×2 163375554
n×3 245063331
n×4 326751108
n×5 408438885

Division

n÷y
n÷2 40843888.5
n÷3 27229259
n÷3 20421944.25
n÷5 16337555.4

Exponentiation

ny
n2 6672892911201729
n3 5.4509378807513E+23
n4 4.4527499804366E+31
n5 3.6373524743866E+39

Nth Root

y√n
2√n 9038.1290652435
3√n 433.89604601774
4√n 95.069075230821
5√n 38.232387169284

Divisors of 81687777

1, 3, 27229259, 81687777

4 divisors

τ Total Divisors 4
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81687776
Sum of the proper positive divisors of n
A Arithmetic Mean 0.25
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 4
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81687777 can be divided by 4 positive divisors. The sum of these divisors (counting 81687777) is 1, the average is 0.25.

Base conversion 81687777

Base System Value
2 Binary 100110111100111010011100001
3 Ternary 12200201011120020
4 Quaternary 10313213103201
5 Quinary 131403002102
6 Senary 12034504053
8 Octal 467472341
10 Decimal 81687777
12 Duodecimal 23435029
16 Hexadecimal 4de74e1
20 Vigesimal 15aaj8h
36 Base36 1cmuox

Cryptographic Hash Functions

md5 b378adbd02e534d870a62edf5234663d
sha1 b96d1e7b9531c5769546ee035c2e7e6139c0775b
sha256 907b18e811ea93bc208fd5944330543fa6bcebe180be450af8c076f710c2efcd
sha512 2bc057344fab4384881c25018444ec49fd4d6aaa063f87452ba2115d96e758873b536c491c99c89e22c5315b0a5ee20a5c836448c051a26fc84f0a8688c3eaae
ripemd-160 a16545ac66b63e98bdf251c02926bdce8cc7a534

81687777 as geometric shapes

Circle

Radius = n
Diameter 163375554
Circumference 513259440.22256
Area 2.0963511348023E+16

Sphere

Radius = n
Volume 2.283283520179E+24
Surface area 8.3854045392091E+16
Circumference 513259440.22256

Square

Length = n
Perimeter 326751108
Area 6672892911201729
Diagonal 115523962.11351

Cube

Length = n
Surface area 40037357467210374
Volume 5.4509378807513E+23
Space diagonal 141487380.12136

Equilateral Triangle

Length = n
Perimeter 245063331
Area 2.8894473889169E+15
Altitude 70743690.060678

Triangular Pyramid

Length = n
Surface area 2.8894473889169E+15
Volume 6.4239918988431E+22
Height 38507987.37117