11138
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 16710
- Proper Divisor Sum (Aliquot Sum)
- 5572
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 5568
- Möbius Function
- 1
- Radical
- 11138
- 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
- 130
- 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
- Numbers whose least quadratic nonresidue (A020649) is 13.at n=32A025025
- Number of partitions satisfying (cn(0,5) <= cn(2,5) = cn(3,5)).at n=46A036804
- Number of connected unlabeled vertex-transitive graphs with n nodes such that complement is also connected.at n=34A054917
- Numbers k such that k + the reversal of k is a square.at n=38A061230
- Number of connected circulant graphs on n nodes.at n=34A075545
- Numbers n such that the product of digits of n equals the concatenation of pi(d)'s where d runs through the digits of n.at n=11A097228
- Composite numbers m that divide A123855(m-1) = Sum_{i=1..m-1} Sum_{j=1..m-1} prime(i)^j.at n=20A123857
- Terms of A123857 that are not powers of 2.at n=8A124238
- Smallest k such that A061762(k) = n.at n=38A130858
- Lexicographically earliest increasing sequence which lists the positions of the zero digits in the sequence.at n=30A167519
- First terms "a" of quadruples a>b>c>d>0 with six square pairwise sums.at n=29A175534
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 318", based on the 5-celled von Neumann neighborhood.at n=29A271252
- Squarefree semiprimes (products of two distinct primes) between sphenic numbers (products of three distinct primes).at n=33A362507
- Numbers that give a perfect power when added to their reverse.at n=45A366080
- Expansion of (1/x) * Series_Reversion( x * (1-x-x^4/(1-x)^2) ).at n=9A367414
- a(n) is the smallest possible side x in a family of triangles with integer sides x, y < x, x-y < z < x+y, such that exactly n pairs of triangles with equal area exist in this family.at n=47A375748