6194
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 9840
- Proper Divisor Sum (Aliquot Sum)
- 3646
- 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
- 2916
- Möbius Function
- -1
- Radical
- 6194
- Omega Function (Ω)
- 3
- 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
- 186
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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
- a(n) is the number of conjugacy classes in the alternating group A_n.at n=33A000702
- Coordination sequence for sigma-CrFe, Position Xc.at n=20A009961
- Expansion of 1/(1-x^3-x^4-x^5-x^6-x^7-x^8-x^9).at n=28A017822
- T(2n+1,n+3), T given by A026780.at n=5A026900
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 78.at n=8A031576
- a(n) = n * prime(n).at n=37A033286
- Number of ways to place a non-attacking white and black pawn on n X n chessboard.at n=9A035290
- Triangle T(n,k) read by rows giving number of fixed 4 X k polyominoes with n cells (n >= 4, 1<=k<=n-3).at n=34A059680
- Dimension of the space of weight n cuspidal newforms for Gamma_1( 93 ).at n=26A063366
- For even k >= 4, let f(k) = A066285(k/2) be the minimal difference between primes p and q whose sum is k. Such a k is in the sequence if f(k) > f(m) for all even m with 4 <= m < k.at n=22A065978
- Numbers k such that Euler phi(k) / Carmichael lambda(k) = 18.at n=33A066697
- Sum(j=1,n,floor(A000041(j)/j)).at n=39A086736
- Coefficients of a solution to a functional equation.at n=21A092834
- A transform of the Jacobsthal numbers.at n=19A099508
- Multiples of 19 containing a 19 in their decimal representation.at n=13A121039
- Number of 0's in the binary expansion of A127962(n).at n=27A127964
- 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, 0), (-1, 0, 0), (1, -1, 1), (1, 0, 1), (1, 1, -1)}.at n=8A148976
- Numbers n whose square can be represented as a repdigit number in some base less than n.at n=29A158235
- Erroneous version of A140763.at n=20A159579
- Numbers k such that there are 2 primes between 100*k and 100*k + 99.at n=10A186394