11623
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 11880
- Proper Divisor Sum (Aliquot Sum)
- 257
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 11368
- Möbius Function
- 1
- Radical
- 11623
- 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
- 161
- 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
- Numbers whose set of base-14 digits is {3,4}.at n=24A032838
- One-sixtieth of the even leg of Pythagorean triangles whose other sides are both primes (other than 3, 5 or 13).at n=38A068485
- Riordan array (1/sqrt(1-2*x-3*x^2), 1/sqrt(1-2*x-3*x^2) -1).at n=46A116392
- Eight rooks and one berserker on a 3 X 3 chessboard. G.f.: (1 + 3*x)/(1 - 4*x - 3*x^2 + 6*x^3).at n=6A180147
- Number of zero-sum -n..n arrays of 4 elements with adjacent element differences also in -n..n.at n=17A202254
- Numbers whose Schwarzian arithmetic derivative is an integer.at n=22A209872
- Numbers n such that n divides the concatenation of all divisors in descending order.at n=4A224930
- Solutions of the equation k'' = tau(k) * k', where k' and k'' are the first and the second arithmetic derivative of k.at n=6A230544
- Number of compositions of n having exactly five fixed points.at n=13A240740
- Array read by antidiagonals: T(m,n) = number of maximal matchings in the grid graph P_m X P_n.at n=47A288026
- Array read by antidiagonals: T(m,n) = number of maximal matchings in the grid graph P_m X P_n.at n=52A288026
- Number of maximal matchings in the grid graph P_3 X P_n.at n=7A288028
- Number of nX5 0..1 arrays with every element equal to 1, 2, 4 or 5 king-move adjacent elements, with upper left element zero.at n=6A297956
- Number of nX7 0..1 arrays with every element equal to 1, 2, 4 or 5 king-move adjacent elements, with upper left element zero.at n=4A297958
- T(n,k)=Number of nXk 0..1 arrays with every element equal to 1, 2, 4 or 5 king-move adjacent elements, with upper left element zero.at n=59A297959
- T(n,k)=Number of nXk 0..1 arrays with every element equal to 1, 2, 4 or 5 king-move adjacent elements, with upper left element zero.at n=61A297959
- Triangle read by rows: T(n,k) is the number of 4-ary strings of length n with k indispensable digits, with 0 <= k <= n.at n=39A330509
- Antihydra, a BB(6) Turing machine (values of a).at n=18A386792