8306
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 12462
- Proper Divisor Sum (Aliquot Sum)
- 4156
- 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
- 4152
- Möbius Function
- 1
- Radical
- 8306
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 65
- 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
- Coordination sequence for sigma-CrFe, Position Xf.at n=23A009958
- a(n) = a(n-1) + a(n-2) + 1, with a(0) = 0 and a(1) = 12.at n=15A022317
- 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 90.at n=14A031588
- Growth function of an infinite cubic graph (number of nodes at distance <=n from fixed node).at n=26A038621
- Bisection (odd part) of Chebyshev sequence with Diophantine property.at n=4A077243
- Combined Diophantine Chebyshev sequences A077245 and A077243.at n=9A077247
- Total sum of parts of multiplicity 1 in all partitions of n.at n=21A103628
- Numbers k such that the k-th and (k+1)-th primes have the same sum of squares of digits.at n=33A109182
- Expansion of g.f.: (1+x^2)*(1+2*x^2)/(1-3*x+3*x^2-6*x^3+2*x^4-2*x^5).at n=9A123892
- a(n) = 4*n^3 - 3*n^2 + 2*n - 1.at n=12A131464
- A054525 * A000041.at n=32A133732
- Numbers k such that k and k^2 use only the digits 0, 3, 6, 8 and 9.at n=24A136945
- Partial sums of A033485.at n=32A178855
- Power floor sequence of 2+sqrt(7).at n=5A218986
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 718", based on the 5-celled von Neumann neighborhood.at n=29A273427
- Numbers n such that A003145(n) = floor(alpha^2*n)+1, where alpha = 1.839... is the positive real zero of x^3-x^2-x-1.at n=25A278352
- Take a squarefree semiprime and take the difference of its prime factors. If it is a squarefree semiprime repeat the process. Sequence lists the squarefree semiprimes that generate other squarefree semiprimes only in the first k steps of this process. Case k = 4.at n=15A296811
- Number of parts in all partitions of n with largest multiplicity seven.at n=26A320377
- Numbers k such that 409*2^k+1 is prime.at n=12A323104
- Row sums of A339494.at n=12A339495