5686
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 25
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 8532
- Proper Divisor Sum (Aliquot Sum)
- 2846
- 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
- 2842
- Möbius Function
- 1
- Radical
- 5686
- 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
- 173
- 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
- a(0) = 1, a(n) = 29*n^2 + 2 for n>0.at n=14A010019
- 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 74.at n=16A031572
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 46 ones.at n=13A031814
- Decimal part of a(n)^(1/n) starts with a 'nine digits' anagram.at n=37A035136
- Number of (odd and even) split numbers (A036382) below 2^n.at n=12A036389
- Numbers having three 7's in base 9.at n=15A043483
- Second partial sums of A001891.at n=10A053809
- Interprimes (A024675) which are of the form s*prime, s=2.at n=40A075277
- Inverse Euler transform of 1, 1, 3, 8, 23, ... (A050535).at n=9A076865
- Expansion of 1/(sqrt(1-2x-3x^2)-x).at n=8A111961
- Numbers with composite sum of digits and prime sum of cubes of digits.at n=21A121642
- Poincaré series [or Poincare series] P(C_{6,2}; x).at n=11A124614
- Number of permutations of 3..n+2 with no element greater than or equal to the sum of its neighbors.at n=7A180891
- Last occurrence of n partitions in A204814.at n=8A205301
- Number of nX1 1..6 arrays with every element value z a city block distance of exactly z from another element value z.at n=12A209055
- Triangle of coefficients of polynomials u(n,x) jointly generated with A210194; see the Formula section.at n=41A210193
- Number of nX6 arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 nX6 array.at n=2A220008
- T(n,k)=Number of nXk arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 nXk array.at n=30A220010
- Number of 3Xn arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 3Xn array.at n=5A220012
- Numbers k such that k*14^k + 1 is prime.at n=10A242197