9586
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 28
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 14382
- Proper Divisor Sum (Aliquot Sum)
- 4796
- 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
- 4792
- Möbius Function
- 1
- Radical
- 9586
- 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
- 73
- 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
- Cubes written backwards.at n=18A004165
- Increasing length runs of consecutive composite numbers (endpoints).at n=9A008995
- a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ...+ a(n-1)*a(1) for n >= 4, starting 2,1,1.at n=8A025264
- Expansion of (1/2)*(1/x^2 - 1/x)*(1-x-sqrt(1-2*x+x^2-4*x^3)) - x.at n=17A052702
- Number of 2-element intersecting families (with not necessarily distinct sets) whose union is an n-element set.at n=8A053156
- Smallest a(n)>2 such that all integers strictly between a(n)-n and a(n) are composite.at n=34A075741
- Two-sided semiprimes: deleting any number of digits at left or at right, but not both, leaves a semiprime.at n=19A086698
- Conjectured numbers n such that the trajectory of n as defined in A003508 is unique.at n=36A105233
- Odd cubes written backwards and sorted.at n=10A107314
- Semiprimes whose digit reversal is a nontrivial power.at n=26A108849
- Semiprimes (A001358) whose digit reversal is a powerful(1) number (A001694).at n=32A115688
- Semiprimes (A001358) whose digit reversal is a cube.at n=4A115712
- t(n)_n where t() = triangular numbers A000217.at n=36A122634
- Sum of the Strahler numbers of all full binary trees with n internal vertices.at n=8A127152
- a(n) = C(2,n) DELTA C(0,n).at n=50A147721
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 1, 0), (0, 0, -1), (0, 1, 0), (1, -1, 0)}.at n=10A148187
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 1), (0, 0, 1), (1, -1, 1), (1, 0, 1), (1, 1, -1)}.at n=7A150585
- Number of saturated chains in the poset of Dyck paths ordered by inclusion.at n=5A166860
- Numbers n whose square representation in base 10 can be split into three parts whose sum is n.at n=29A254648
- Where record values occur in A276781, when starting from A276781(2)=1.at n=35A276782