6387
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 24
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 8520
- Proper Divisor Sum (Aliquot Sum)
- 2133
- 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
- 4256
- Möbius Function
- 1
- Radical
- 6387
- Omega Function (Ω)
- 2
- 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
- yes
- Squarefree Number
- yes
- 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
- a(0)=a(1)=3; thereafter a(n) = a(n-1) + a(n-2) + 1.at n=16A022403
- a(0)=3, a(1)=7; thereafter a(n) = a(n-1) + a(n-2) + 1.at n=15A022406
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 79.at n=17A031577
- Number of partitions of n with equal nonzero number of parts congruent to each of 0 and 2 (mod 3).at n=42A035538
- Numbers whose base-5 representation contains exactly two 0's and three 2's.at n=25A045183
- A bisection of A000960.at n=44A099062
- Generalized Mancala solitaire (A002491); to get n-th term, start with n and successively round up to next 10 multiples of n-1, n-2, ..., 1, for n>=1.at n=36A113747
- Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 101-111-100 pattern in any orientation.at n=12A146194
- Numbers that have 9 terms in their Zeckendorf representation.at n=2A179249
- The hyper-Wiener index of a benzenoid consisting of a straight-line chain of n hexagons (s=2; see the Gutman et al. reference).at n=5A193390
- Triangle of numbers with n 1's and n 0's in their representation in base of Fibonacci numbers (A014417).at n=37A210619
- Minimal order of degree-n irreducible polynomials over GF(23).at n=37A218363
- Number of 4 X n arrays of the minimum value of corresponding elements and their horizontal or diagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..1 4 X n array.at n=31A220034
- Number of n X 2 0..2 arrays of the median of the corresponding element, the element to the east and the element to the south in a larger (n+1) X 3 0..2 array.at n=3A228972
- Number of nX4 0..2 arrays of the median of the corresponding element, the element to the east and the element to the south in a larger (n+1)X5 0..2 array.at n=1A228974
- T(n,k) = number of nXk 0..2 arrays of the median of the corresponding element, the element to the east and the element to the south in a larger (n+1)X(k+1) 0..2 array.at n=11A228977
- T(n,k) = number of nXk 0..2 arrays of the median of the corresponding element, the element to the east and the element to the south in a larger (n+1)X(k+1) 0..2 array.at n=13A228977
- Number of length n binary words such that maximal runs of 1's are restricted to length one or two and maximal runs of 0's are of odd length.at n=18A236340
- Numbers n such that n + prime(n), n + 1 + prime(n+1) and n + 2 + prime(n+2) are divisible by 7.at n=40A239457
- Number of partitions of n having no perfect cube parts (n>=0).at n=42A264393