161808991 (number)

161808991 is an odd 9-digits prime number following 161808990 and preceding 161808992. In scientific notation, it is written as 1.61808991 × 10^8. The sum of its digits is 43. It has a total of 1 prime factors and 2 positive divisors. There are 161808990 positive integers (up to 161808991) that are relatively prime to 161808991.

Interesting facts

Basic properties

Name

Name one hundred sixty-one million eight hundred eight thousand nine hundred ninety-one

Notation

Scientific notation 1.61808991 × 10^8
Engineering notation 1.61808991 × 10^6

Prime Factorization of 161808991

Prime Factorization 161808991

Composite number
ω Distinct Factors 1
Total number of distinct prime factors
Ω Total Factors 1
Total number of prime factors
rad Radical 161808991
Product of the distinct prime numbers

The prime factorization of 161808991 is 161808991. Since it has a total of 1 prime factors.

Most popular turbo-numbers

10, 3, 42, 93, 644, 651, 3413, 5943, 89459, 39371, 869971, 11085, 479664, 8725636, 57664865, 91738173, 141280659, 797146630, 5218144527, 5374989319

Basic calculations (n = 161808991)

Multiplication

n×y
n×2 323617982
n×3 485426973
n×4 647235964
n×5 809044955

Division

n÷y
n÷2 80904495.5
n÷3 53936330.333333
n÷3 40452247.75
n÷5 32361798.2

Exponentiation

ny
n2 26182149568438081
n3 4.2365072038801E+24
n4 6.8550495602406E+32
n5 1.1092086525975E+41

Nth Root

y√n
2√n 12720.416306081
3√n 544.92184273264
4√n 112.78482303076
5√n 43.832932829115

Divisors of 161808991

1, 161808991

2 divisors

τ Total Divisors 2
Total number of the positive divisors of n
σ Sum of Divisors 161808992
Sum of all the positive divisors of n
s Aliquot Sum 1
Sum of the proper positive divisors of n
A Arithmetic Mean 80904496
Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G Geometric Mean 12720.416345387
Returns the nth root of the product of n divisors
H Harmonic Mean 1.9999999876397
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 161808991 can be divided by 2 positive divisors. The sum of these divisors (counting 161808991) is 161808992, the average is 80904496.

Base conversion 161808991

Base System Value
2 Binary 1001101001010000001001011111
3 Ternary 102021110202012121
4 Quaternary 21221100021133
5 Quinary 312410341431
6 Senary 24020043411
8 Octal 1151201137
10 Decimal 161808991
12 Duodecimal 46233567
16 Hexadecimal 9a5025f
20 Vigesimal 2ab629b
36 Base36 2oc4m7

Cryptographic Hash Functions

md5 62bf99ce429d8e00c47b0cf669918564
sha1 1f7d52b84f7f6b5bc8e64e2ed0f3335957fe6ee3
sha256 73afa426f0f139648471c5792c75381ff1ebe0ff53d7a49b09afb1f7ec980c84
sha512 cd5f9f17c5d641aa376541a750bdcf7a6d26d5161795b22458a143c97b52282b091a6779b651a91f6058e9837b251158d9611b808791330621014e03f5ba1548
ripemd-160 60b9960597faa6a9c631c76e4b937777e3e6e580

161808991 as geometric shapes

Circle

Radius = n
Diameter 323617982
Circumference 1016675874.8208
Area 8.2253648739394E+16

Sphere

Radius = n
Volume 1.774583987812E+25
Surface area 3.2901459495758E+17
Circumference 1016675874.8208

Square

Length = n
Perimeter 647235964
Area 26182149568438081
Diagonal 228832469.58611

Cube

Length = n
Surface area 157092897410628486
Volume 4.2365072038801E+24
Space diagonal 280261393.53346

Equilateral Triangle

Length = n
Perimeter 485426973
Area 1.1337203325976E+16
Altitude 140130696.76673

Triangular Pyramid

Length = n
Surface area 1.1337203325976E+16
Volume 4.9927716206821E+23
Height 76277489.862035