5366
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 8052
- Proper Divisor Sum (Aliquot Sum)
- 2686
- 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
- 2682
- Möbius Function
- 1
- Radical
- 5366
- 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
- 72
- 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
- yes
- Odd
- no
Appears in sequences
- Subtrees in rooted plane trees on n nodes.at n=6A007856
- Numbers k such that the continued fraction for sqrt(k) has period 78.at n=9A020417
- a(n) = a(n-1) + a(n-2) + 1, with a(0) = 1 and a(1) = 12.at n=14A022326
- Number of 2's in n-th term of A007651.at n=34A022467
- n written in fractional base 7/5.at n=34A024642
- a(n) = position of n^2 + (n+1)^2 + (n+2)^2 in A004432.at n=45A024809
- Expansion of (1+x^2-x^3)/(1-x)^4.at n=29A027378
- 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 72.at n=13A031570
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 36 ones.at n=18A031804
- a(n) = 4*n^2 - 3*n + 1.at n=37A054552
- Interprimes (A024675) which are of the form s*prime, s=2.at n=39A075277
- Number of 4-chromatic (i.e., chromatic number equals 4) simple graphs on n nodes.at n=7A076280
- Triangle read by rows: T(n,k) is the number of simple graphs on n unlabeled nodes having chromatic number k, 1 <= k <= n.at n=31A084268
- Smallest semiprime equal to the sum of n distinct primes.at n=49A104646
- Semiprimes in A054552.at n=9A113690
- Triangle read by rows: let a(n,k) = number of graphs on n nodes with chromatic number k; T(n,k) = a(n,n-k), n >= 2, k=0..n-2.at n=25A115597
- Sequence of which A078783 is the Recamán transform.at n=34A117073
- Number at start of segment n of A117073.at n=11A117074
- Index of first occurrence of n in A154404.at n=34A154952
- Number of equivalence classes of connected bipartite graphs on n nodes up to sequences of edge local complementation and isomorphism.at n=11A156802