11169
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 17316
- Proper Divisor Sum (Aliquot Sum)
- 6147
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 6912
- Möbius Function
- 0
- Radical
- 3723
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 3
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
- no
- Squarefree Number
- no
- 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
- Pseudoprimes to base 10.at n=33A005939
- a(n) = floor(n*(n+2)*(2*n-1)/8).at n=34A007518
- a(n) = 2*a(n-1) + a(n-3), with a(0)=1 and a(1)=2.at n=12A008998
- Pisot sequences E(4,9), P(4,9).at n=10A020708
- a(n)=Sum{T(n,j): j=1,2,...,n}, array T given by A048225.at n=23A048235
- Number of nonisomorphic ways a loop can cross two parallel roads 2n times.at n=7A086031
- Structured small rhombicosidodecahedral numbers.at n=8A100148
- Divisors of 10^16 - 1.at n=37A111211
- Number of benzenoids with 22 hexagons, C_(2v) symmetry and containing n carbon atoms.at n=15A123106
- Duplicate of A008998.at n=13A141016
- The Ca3 sums of the Pell-Jacobsthal triangle A013609.at n=6A180675
- a(n) = n*(7*n^2 - 3*n - 1)/3.at n=17A214659
- Numbers k such that 4^k + 7 is prime.at n=37A217349
- a(n) = n*(5*n^2-8*n+5)/2.at n=17A226449
- Number of partitions of n such that (greatest part) - (least part) = number of parts.at n=50A237832
- If n <= 5 then a(n) = 1, if 6 <= n <= 8 then 2, if n = 9 or 10 then 3, if n = 11, 12 or 13 then n-7; otherwise a(n) = 2*a(n - 4) + a(n - 12).at n=50A239905
- Number of 3 X n 0..1 arrays with no element equal to fewer vertical neighbors than horizontal neighbors, with new values 0..1 introduced in row major order.at n=10A240784
- a(n) = n*(n + 1)*(4*n + 5)/2.at n=17A281381
- Expansion of x^2/(1 - 4*x - 4*x^2 - x^3).at n=8A293710
- Pseudoprimes to base 10 that are not squarefree.at n=5A306449