161808987 (number)

161808987 is an odd 9-digits composite number following 161808986 and preceding 161808988. In scientific notation, it is written as 1.61808987 × 10^8. The sum of its digits is 48. It has a total of 2 prime factors and 4 positive divisors. There are 107872656 positive integers (up to 161808987) that are relatively prime to 161808987.

Interesting facts

Basic properties

Name

Name one hundred sixty-one million eight hundred eight thousand nine hundred eighty-seven

Notation

Scientific notation 1.61808987 × 10^8
Engineering notation 1.61808987 × 10^6

Prime Factorization of 161808987

Prime Factorization 3 × 53936329

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 161808987
Product of the distinct prime numbers

The prime factorization of 161808987 is 3 × 53936329. Since it has a total of 2 prime factors.

Most popular turbo-numbers

10, 2, 73, 31, 766, 717, 9832, 4564, 57231, 69961, 346488, 351950, 4475213, 9401950, 74550808, 89651117, 239789570, 942654812, 3548092572, 708005399

Basic calculations (n = 161808987)

Multiplication

n×y
n×2 323617974
n×3 485426961
n×4 647235948
n×5 809044935

Division

n÷y
n÷2 80904493.5
n÷3 53936329
n÷3 40452246.75
n÷5 32361797.4

Exponentiation

ny
n2 26182148273966169
n3 4.2365068896943E+24
n4 6.8550488823995E+32
n5 1.1092085154965E+41

Nth Root

y√n
2√n 12720.416148853
3√n 544.92183824239
4√n 112.78482233374
5√n 43.8329326124

Divisors of 161808987

1, 3, 53936329, 161808987

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 -161808986
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 161808987 can be divided by 4 positive divisors. The sum of these divisors (counting 161808987) is 1, the average is 0.25.

Base conversion 161808987

Base System Value
2 Binary 1001101001010000001001011011
3 Ternary 102021110202012110
4 Quaternary 21221100021123
5 Quinary 312410341422
6 Senary 24020043403
8 Octal 1151201133
10 Decimal 161808987
12 Duodecimal 46233563
16 Hexadecimal 9a5025b
20 Vigesimal 2ab6297
36 Base36 2oc4m3

Cryptographic Hash Functions

md5 e077895cae4d3c496b4ff032512623ee
sha1 daad8039fc3366cad7ab5b0a1eac8efa6420dc49
sha256 7d1a544cb660615ec9065ce8f464398d601145f25fcf8498cbab9460352f5812
sha512 ac763f247993364bbb33d118cc85f181a5ef301244c63e39ca33397923a556a81f34a06fc315b8b47151a69bad93ef49a360100d2b736ae4e9f10f091df14f4e
ripemd-160 f9af470a30b5a3e220bf0981b2accf74ec8e461b

161808987 as geometric shapes

Circle

Radius = n
Diameter 323617974
Circumference 1016675849.688
Area 8.2253644672691E+16

Sphere

Radius = n
Volume 1.7745838562061E+25
Surface area 3.2901457869076E+17
Circumference 1016675849.688

Square

Length = n
Perimeter 647235948
Area 26182148273966169
Diagonal 228832463.92925

Cube

Length = n
Surface area 157092889643797014
Volume 4.2365068896943E+24
Space diagonal 280261386.60525

Equilateral Triangle

Length = n
Perimeter 485426961
Area 1.1337202765453E+16
Altitude 140130693.30263

Triangular Pyramid

Length = n
Surface area 1.1337202765453E+16
Volume 4.9927712504106E+23
Height 76277487.976417