81591489 (number)

81591489 is an odd 8-digits composite number following 81591488 and preceding 81591490. In scientific notation, it is written as 8.1591489 × 10^7. The sum of its digits is 45. It has a total of 5 prime factors and 32 positive divisors. There are 46469376 positive integers (up to 81591489) that are relatively prime to 81591489.

Interesting facts

Basic properties

Name

Name eighty-one million five hundred ninety-one thousand four hundred eighty-nine

Notation

Scientific notation 8.1591489 × 10^7
Engineering notation 8.1591489 × 10^6

Prime Factorization of 81591489

Prime Factorization 9 × 3 × 7 × 997 × 433

Composite number
ω Distinct Factors 5
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 81591489
Product of the distinct prime numbers

The prime factorization of 81591489 is 9 × 3 × 7 × 997 × 433. Since it has a total of 5 prime factors.

Most popular turbo-numbers

1, 2, 60, 10, 466, 476, 5887, 9690, 36114, 40692, 855353, 583828, 2732525, 9992824, 24073361, 31100710, 317822801, 510832790, 9017474060, 5919022684

Basic calculations (n = 81591489)

Multiplication

n×y
n×2 163182978
n×3 244774467
n×4 326365956
n×5 407957445

Division

n÷y
n÷2 40795744.5
n÷3 27197163
n÷3 20397872.25
n÷5 16318297.8

Exponentiation

ny
n2 6657171077237121
n3 5.4316850071951E+23
n4 4.4317926751602E+31
n5 3.6159656330562E+39

Nth Root

y√n
2√n 9032.8007284563
3√n 433.72549659904
4√n 95.041047597637
5√n 38.223369768699

Divisors of 81591489

1, 3, 7, 9, 21, 27, 63, 189, 433, 997, 1299, 2991, 3031, 3897, 6979, 8973, 9093, 11691, 20937, 26919, 27279, 62811, 81837, 188433, 431701, 1295103, 3021907, 3885309, 9065721, 11655927, 27197163, 81591489

32 divisors

τ Total Divisors 32
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81591488
Sum of the proper positive divisors of n
A Arithmetic Mean 0.03125
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 32
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81591489 can be divided by 32 positive divisors. The sum of these divisors (counting 81591489) is 1, the average is 0.03125.

Base conversion 81591489

Base System Value
2 Binary 100110111001111110011000001
3 Ternary 12200112021111000
4 Quaternary 10313033303001
5 Quinary 131341411424
6 Senary 12032442213
8 Octal 467176301
10 Decimal 81591489
12 Duodecimal 233a9369
16 Hexadecimal 4dcfcc1
20 Vigesimal 159iie9
36 Base36 1ckse9

Cryptographic Hash Functions

md5 542149ccddfd3663631ecdbd2eebb3c1
sha1 0b4ef537cf3ade9440735ce93305ce9d00f2160a
sha256 d0dc4112ed3f8ecd5fe472aa1e6db0108fdcb9af95538df31fc6c78113942bd1
sha512 0481ab4a77084d1997e9e0f93e7d515ad48e1b9cd199688280f98399e381f4b0d99f36d674ca8138755d51a6173e8510a52329185e3312b4cfc7eaea14d4df4c
ripemd-160 d55fcd2def7a93fea5901b478b8c767950a62bfd

81591489 as geometric shapes

Circle

Radius = n
Diameter 163182978
Circumference 512654444.8757
Area 2.0914119749939E+16

Sphere

Radius = n
Volume 2.2752188953624E+24
Surface area 8.3656478999754E+16
Circumference 512654444.8757

Square

Length = n
Perimeter 326365956
Area 6657171077237121
Diagonal 115387790.31802

Cube

Length = n
Surface area 39943026463422726
Volume 5.4316850071951E+23
Space diagonal 141320604.4132

Equilateral Triangle

Length = n
Perimeter 244774467
Area 2.8826396351132E+15
Altitude 70660302.206599

Triangular Pyramid

Length = n
Surface area 2.8826396351132E+15
Volume 6.4013021697616E+22
Height 38462596.772672