14319
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
- 2
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 21736
- Proper Divisor Sum (Aliquot Sum)
- 7417
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 9072
- Möbius Function
- 0
- Radical
- 4773
- 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
- 195
- 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
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 13 ones.at n=26A031781
- a(n)-th prime is the smallest prime containing exactly n 5's.at n=4A037062
- Sums of 12 distinct powers of 2.at n=31A038463
- Numbers k such that k divides the (right) concatenation of all numbers <= k written in base 19 (most significant digit on right).at n=21A061948
- Triangle related to Bell numbers; T(n,k) read by rows, n>=0, 0<=k<=n: T(n,k) = k*T(n-1,k) + Sum(0<=j, T(n-1,k-1+j)); T(0,0)=1, T(0,k)=0 if k>0.at n=37A086211
- A Chebyshev transform of A048739 related to the knot 8_5.at n=14A099854
- A bisection of A129095: a(n) = A129095(2n-1) for n>=1.at n=47A129096
- a(n) = A129095(2^n + 2^(n-1) - 1) for n>=1.at n=5A129098
- a(1) = 3, a(n + 1) = 1 + a(n) + least odd prime factor of a(n).at n=28A144751
- A (-1,-3) Somos-4 sequence associated to y^2 + y = x^3 + 4*x^2 + x.at n=8A178377
- Number of 3-step S, E, and NW-moving king's tours on an n X n board summed over all starting positions.at n=40A187508
- a(n) = number of n-lettered words in the alphabet {1, 2, 3} with as many occurrences of the substring (consecutive subword) [1, 1, 2] as of [2, 1, 1].at n=9A211292
- G.f.: Sum_{n>=1} x^n * (1+x)^prime(n).at n=11A227234
- Number of length-4 0..n arrays with no repeated value differing from the previous repeated value by other than plus two or minus 1.at n=9A269641
- Denominators of r-Egyptian fraction expansion for log(2), where r(k) = 1/(2k-1).at n=4A270555
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 438", based on the 5-celled von Neumann neighborhood.at n=31A272219
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 621", based on the 5-celled von Neumann neighborhood.at n=22A273268
- Expansion of (1/(1 - x)) * Sum_{k>=0} x^(2*k) / Product_{j=1..2*k} (1 - x^j).at n=30A304620
- Place n equally spaced points on each side of an equilateral triangle, and join each of these points by a chord to the 2*n new points on the other two sides: sequence gives number of interior vertices in the resulting planar graph.at n=10A366484