9647
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 26
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 10536
- Proper Divisor Sum (Aliquot Sum)
- 889
- 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
- 8760
- Möbius Function
- 1
- Radical
- 9647
- 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
- 122
- 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
- no
- Odd
- yes
Appears in sequences
- Total number of fixed points in trees with n nodes.at n=12A005201
- Dying rabbits: a(n) = a(n-1) + a(n-2) - a(n-9).at n=21A023439
- Number of perifusenes with one internal vertex.at n=10A038380
- Number of perifusenes with one internal vertex and symmetry point group C_s.at n=10A038381
- Numbers k such that 8*10^k + 6*R_k + 3 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=13A103088
- Diagonal sums of correlation triangle for (1+x)^3/(1-x).at n=44A115294
- Expansion of f(-x^4, -x^16) / psi(-x) in powers of x where psi() is a Ramanujan theta function and f(, ) is Ramanujan's general theta function.at n=52A122130
- Duplicate of A038381.at n=7A122738
- Numbers of perifusenes with one internal vertex (see Cyvin et al. for precise definition).at n=7A122739
- Number of partitions of n in which each even part has odd multiplicity.at n=36A130126
- Partial sum of irregular primes A000928.at n=30A132360
- Numerator of Euler(n, 7/25).at n=3A156970
- Number of nondecreasing integer sequences of length 5 with sum zero and sum of absolute values 2n.at n=44A158139
- Number of binary strings of length n with no substrings equal to 0001 0101 or 1011.at n=15A164473
- Second elementary symmetric function of the first n terms of (1,2,2,3,3,4,4,5,5...).at n=20A203298
- Number of (n+1) X (1+1) 0..3 arrays with the maximum plus the upper median plus the minimum of every 2 X 2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=2A237672
- Number of (n+1)X(3+1) 0..3 arrays with the maximum plus the upper median plus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=0A237674
- T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum plus the upper median plus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=3A237677
- T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum plus the upper median plus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=5A237677
- Number of partitions p of n such that (number of even numbers in p) = 2*(number of odd numbers in p).at n=48A241643