6093
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 8814
- Proper Divisor Sum (Aliquot Sum)
- 2721
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 4056
- Möbius Function
- 0
- Radical
- 2031
- Omega Function (Ω)
- 3
- Little Omega Function (ω)
- 2
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 36
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Number of n-covers of an unlabeled 7-set.at n=3A005748
- Number of 4-covers of an unlabeled n-set.at n=7A005784
- Expansion of 1/(1-x^4-x^5-x^6-x^7-x^8-x^9-x^10-x^11).at n=34A017833
- Pseudoprimes to base 26.at n=36A020154
- Numbers k such that Fib(k) == -34 (mod k).at n=37A023169
- Lucky numbers with size of gaps equal to 14 (upper terms).at n=30A031897
- Lucky numbers with size of gaps equal to 18 (lower terms).at n=34A031900
- Triangle T(n,k) read by rows, giving number of k-member minimal covers of an unlabeled n-set, k=1..n.at n=58A055080
- Numbers n such that n | 8^n + 7^n + 6^n + 5^n + 4^n + 3^n + 2^n + 1^n.at n=35A056751
- First (leftmost) digit - second digit + third digit - fourth digit .... = 12.at n=41A061881
- Number of unimodal partitions/compositions of n into distinct terms.at n=33A072706
- Row sums of triangle A137629.at n=25A137630
- Odd integers n such that (x^n + 1/x^n)/sqrt(8) + 1 is prime, where x = sqrt(8) + sqrt(7).at n=11A158790
- Triangle, read by rows, defined by T(n, k) = b(n) - b(k) - b(n-k) + 1, where b(n) = 5*b(n-1) - 4*b(n-2) + 3*b(n-3) - 2*b(n-4) - b(n-5) and b(0) = 0, b(1) = 1, b(2) = 5, b(3) = 21, b(4) = 88.at n=33A176483
- Triangle, read by rows, defined by T(n, k) = b(n) - b(k) - b(n-k) + 1, where b(n) = 5*b(n-1) - 4*b(n-2) + 3*b(n-3) - 2*b(n-4) - b(n-5) and b(0) = 0, b(1) = 1, b(2) = 5, b(3) = 21, b(4) = 88.at n=30A176483
- G.f.: 1/(1 - x^2/(1 - x^5/(1 - x^8/(1 - x^11/(1 - x^14/(1 - x^17/(1 -...- x^(3*n-1)/(1 -...)))))))), a continued fraction.at n=45A206738
- Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any horizontal, vertical or antidiagonal neighbor, and containing the value n(n+1)/2-7.at n=3A211929
- T(n,k)=Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any horizontal, vertical or antidiagonal neighbor, and containing the value n(n+1)/2-k-1.at n=39A211930
- Sum of odd quadratic residues of prime(n).at n=49A232505
- Number of (n+1)X(1+1) 0..2 arrays with the maximum plus the minimum minus the lower median of every 2X2 subblock equal.at n=3A236821