81491007 (number)

81491007 is an odd 8-digits composite number following 81491006 and preceding 81491008. In scientific notation, it is written as 8.1491007 × 10^7. The sum of its digits is 30. It has a total of 4 prime factors and 16 positive divisors. There are 49825152 positive integers (up to 81491007) that are relatively prime to 81491007.

Interesting facts

Basic properties

Name

Name eighty-one million four hundred ninety-one thousand seven

Notation

Scientific notation 8.1491007 × 10^7
Engineering notation 8.1491007 × 10^6

Prime Factorization of 81491007

Prime Factorization 3 × 13 × 157 × 13309

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81491007
Product of the distinct prime numbers

The prime factorization of 81491007 is 3 × 13 × 157 × 13309. Since it has a total of 4 prime factors.

Most popular turbo-numbers

5, 4, 25, 55, 135, 940, 6479, 4485, 46197, 13522, 527635, 28003, 7908855, 4668437, 61279111, 90277893, 306320701, 308500305, 5422839925, 4096199994

Basic calculations (n = 81491007)

Multiplication

n×y
n×2 162982014
n×3 244473021
n×4 325964028
n×5 407455035

Division

n÷y
n÷2 40745503.5
n÷3 27163669
n÷3 20372751.75
n÷5 16298201.4

Exponentiation

ny
n2 6640784221874049
n3 5.4116419351023E+23
n4 4.4100015081491E+31
n5 3.5937546377059E+39

Nth Root

y√n
2√n 9027.2369526893
3√n 433.54737545449
4√n 95.011772705751
5√n 38.213950516556

Divisors of 81491007

1, 3, 13, 39, 157, 471, 2041, 6123, 13309, 39927, 173017, 519051, 2089513, 6268539, 27163669, 81491007

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 -81491006
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 81491007 can be divided by 16 positive divisors. The sum of these divisors (counting 81491007) is 1, the average is 0.0625.

Base conversion 81491007

Base System Value
2 Binary 100110110110111010000111111
3 Ternary 12200100011122110
4 Quaternary 10312313100333
5 Quinary 131330203012
6 Senary 12030345103
8 Octal 466672077
10 Decimal 81491007
12 Duodecimal 2335b193
16 Hexadecimal 4db743f
20 Vigesimal 15967a7
36 Base36 1cimv3

Cryptographic Hash Functions

md5 e86ce6c1f0bd0c2613c4a6a8ba39b2e7
sha1 5f8c1deec534b4b77e47e63f47d178a8fc2f0b77
sha256 3a1755394dac054f5b146584cbf810f0a6ded4fbd33d074a11f16e8a78bd067c
sha512 1b076123a4dc56652ff7b2275fbf0f218e793528df0112f9ed891f55b6037d0738341f4c3a62a45902fcc2c8a18f1b2b8dd7245dcce3df0d3810eb685dbf0ca9
ripemd-160 904029fd03261114cd8fef096691e948c4af2fb5

81491007 as geometric shapes

Circle

Radius = n
Diameter 162982014
Circumference 512023097.84967
Area 2.0862638925515E+16

Sphere

Radius = n
Volume 2.2668232729568E+24
Surface area 8.3450555702058E+16
Circumference 512023097.84967

Square

Length = n
Perimeter 325964028
Area 6640784221874049
Diagonal 115245687.31084

Cube

Length = n
Surface area 39844705331244294
Volume 5.4116419351023E+23
Space diagonal 141146564.48395

Equilateral Triangle

Length = n
Perimeter 244473021
Area 2.8755439185969E+15
Altitude 70573282.241976

Triangular Pyramid

Length = n
Surface area 2.8755439185969E+15
Volume 6.3776811827739E+22
Height 38415229.103614