6805 (number)
6,805 (six thousand eight hundred five) is an odd fourdigits composite number following 6804 and preceding 6806. In scientific notation, it is written as 6.805 × 10^{3}. The sum of its digits is 19. It has a total of 2 prime factors and 4 positive divisors. There are 5,440 positive integers (up to 6805) that are relatively prime to 6805.
Basic properties
 Is Prime? No
 Number parity Odd
 Number length 4
 Sum of Digits 19
 Digital Root 1
Name
Short name  6 thousand 805 

Full name  six thousand eight hundred five 
Notation
Scientific notation  6.805 × 10^{3} 

Engineering notation  6.805 × 10^{3} 
Prime Factorization of 6805
Prime Factorization 5 × 1361
Composite numberω(n)  Distinct Factors  2  Total number of distinct prime factors 

Ω(n)  Total Factors  2  Total number of prime factors 
rad(n)  Radical  6805  Product of the distinct prime numbers 
λ(n)  Liouville Lambda  1  Returns the parity of Ω(n), such that λ(n) = (1)^{Ω(n)} 
μ(n)  Mobius Mu  1  Returns:

Λ(n)  Mangoldt function  0  Returns log(p) if n is a power p^{k} of any prime p (for any k >= 1), else returns 0 
The prime factorization of 6,805 is 5 × 1361. Since it has a total of 2 prime factors, 6,805 is a composite number.
Divisors of 6805
4 divisors
τ(n)  Total Divisors  4  Total number of the positive divisors of n 

σ(n)  Sum of Divisors  8172  Sum of all the positive divisors of n 
s(n)  Aliquot Sum  1367  Sum of the proper positive divisors of n 
A(n)  Arithmetic Mean  2043  Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n)) 
G(n)  Geometric Mean  82.492423894561  Returns the nth root of the product of n divisors 
H(n)  Harmonic Mean  3.3308859520313  Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors 
The number 6,805 can be divided by 4 positive divisors (out of which 0 are even, and 4 are odd). The sum of these divisors (counting 6,805) is 8,172, the average is 2,043.
Other Arithmetic Functions (n = 6805)
φ(n)  Euler Totient  5440  Total number of positive integers not greater than n that are coprime to n 

λ(n)  Carmichael Lambda  1360  Smallest positive number such that a^{λ(n)} ≡ 1 (mod n) for all a coprime to n 
π(n)  Prime Pi  ≈ 879  Total number of primes less than or equal to n 
r_{2}(n)  Sum of 2 squares  16  The number of ways n can be represented as the sum of 2 squares 
There are 5,440 positive integers (less than 6,805) that are coprime with 6,805. And there are approximately 879 prime numbers less than or equal to 6,805.
Divisibility of 6805
m  2  3  4  5  6  7  8  9 

n mod m  1  1  1  0  1  1  5  1 
The number 6,805 is divisible by 5.
Classification of 6805
By Arithmetic functions
 Arithmetic
 Semiprime
 Deficient
Expressible via specific sums
 Polite
By Powers
 Square Free
Other numbers
 LucasCarmichael
Base conversion (6805)
Base  System  Value 

2  Binary  1101010010101 
3  Ternary  100100001 
4  Quaternary  1222111 
5  Quinary  204210 
6  Senary  51301 
8  Octal  15225 
10  Decimal  6805 
12  Duodecimal  3b31 
16  Hexadecimal  1a95 
20  Vigesimal  h05 
36  Base36  591 
Basic calculations (n = 6805)
Multiplication
n×yn×2  13610 

n×3  20415 
n×4  27220 
n×5  34025 
Division
n÷yn÷2  3402.500 

n÷3  2268.333 
n÷4  1701.250 
n÷5  1361.000 
Exponentiation
n^{y}n^{2}  46308025 

n^{3}  315126110125 
n^{4}  2144433179400625 
n^{5}  14592867785821253125 
Nth Root
^{y}√n^{2}√n  82.492423894561 

^{3}√n  18.950007077828 
^{4}√n  9.082534001839 
^{5}√n  5.8420547926762 
6805 as geometric shapes
Circle
Radius = nDiameter  13610 

Circumference  42757.076015357 
Area  145480951.14225 
Sphere
Radius = nVolume  1319997163364 

Surface area  581923804.56901 
Circumference  42757.076015357 
Square
Length = nPerimeter  27220 

Area  46308025 
Diagonal  9623.7232919489 
Cube
Length = nSurface area  277848150 

Volume  315126110125 
Space diagonal  11786.605745506 
Equilateral Triangle
Length = nPerimeter  20415 

Area  20051963.024542 
Altitude  5893.3028727531 
Triangular Pyramid
Length = nSurface area  80207852.09817 

Volume  37137968233.054 
Height  5556.2592332132 
Cryptographic Hash Functions
md5  5faf461eff3099671ad63c6f3f094f7f 

sha1  ad87fe7bff5a47d5c1407f5f263c80a8796166dc 
sha256  234c8272513622f1422943145456a85cc557a7c67cdaf73a122a494e3324e6da 
sha512  4a361d1dd8729da0c74f685bd81ae7177823f69bad9d07a4b61dcd6ff2ba6414018c7015268499b7d30204cee532bb10cacb3aaff9f00662b5c8d39427feee08 
ripemd160  0f5d62aa6cce961feab4cebc494d67d5cd9b0029 