7921 (number)

7921 is an odd 4-digits composite number following 7920 and preceding 7922. In scientific notation, it is written as 7.921 × 10^3. The sum of its digits is 19. It has a total of 2 prime factors and 3 positive divisors. There are 7832 positive integers (up to 7921) that are relatively prime to 7921.

Interesting facts

Basic properties

Name

Name seven thousand nine hundred twenty-one

Notation

Scientific notation 7.921 × 10^3
Engineering notation 7.921 × 10^3

Prime Factorization of 7921

Prime Factorization 89 × 89

Composite number
ω Distinct Factors 1
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 89
Product of the distinct prime numbers

The prime factorization of 7921 is 89 × 89. Since it has a total of 2 prime factors.

Most popular turbo-numbers

Basic calculations (n = 7921)

Multiplication

n×y
n×2 15842
n×3 23763
n×4 31684
n×5 39605

Division

n÷y
n÷2 3960.5
n÷3 2640.3333333333
n÷3 1980.25
n÷5 1584.2

Exponentiation

ny
n2 62742241
n3 496981290961
n4 3936588805702081
n5 3.1181719929966E+19

Nth Root

y√n
2√n 89
3√n 19.933948768546
4√n 9.4339811320566
5√n 6.0222114833056

Divisors of 7921

1, 89, 7921

3 divisors

τ Total Divisors 3
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -7920
Sum of the proper positive divisors of n
A Arithmetic Mean 0.33333333333333
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 3
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 7921 can be divided by 3 positive divisors. The sum of these divisors (counting 7921) is 1, the average is 0.33333333333333.

Base conversion 7921

Base System Value
2 Binary 1111011110001
3 Ternary 101212101
4 Quaternary 1323301
5 Quinary 223141
6 Senary 100401
8 Octal 17361
10 Decimal 7921
12 Duodecimal 4701
16 Hexadecimal 1ef1
20 Vigesimal jg1
36 Base36 641

Cryptographic Hash Functions

md5 ad62cfd33e3870262d6bf5331c1f13b0
sha1 5b5dfb76344dd298236b67f20cdb8318db4f8aaa
sha256 d66b138c54ab92e2b9c23cff02db4961c4a4c905b1d71b4fc93a3e64a3919f13
sha512 0fb1f4aa12562dda95d221008287a73b6c302e3d2724b751117fda4b51156fc5c09467dd99f4994508120005da0b98daf4bb81f2033aec14b512b5a03e9a4d8c
ripemd-160 5a3b7c133ef0be109a5a76d1bfca71fd27a155ca

7921 as geometric shapes

Circle

Radius = n
Diameter 15842
Circumference 49769.11081817
Area 197110563.39536

Sphere

Radius = n
Volume 2081750363539.5
Surface area 788442253.58144
Circumference 49769.11081817

Square

Length = n
Perimeter 31684
Area 62742241
Diagonal 11201.985627557

Cube

Length = n
Surface area 376453446
Volume 496981290961
Space diagonal 13719.574446753

Equilateral Triangle

Length = n
Perimeter 23763
Area 27168187.298183
Altitude 6859.7872233765

Triangular Pyramid

Length = n
Surface area 27168187.298183
Volume 58569806826.895
Height 3733.9952091858