9608
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 23
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 18030
- Proper Divisor Sum (Aliquot Sum)
- 8422
- 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
- 4800
- Möbius Function
- 0
- Radical
- 2402
- Omega Function (Ω)
- 4
- 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
- 60
- 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
- yes
- Odd
- no
Appears in sequences
- Number of unlabeled simple digraphs with n nodes.at n=5A000273
- Integer part of ((4th elementary symmetric function of 1,2,...,n)/(1+2+...+n)).at n=11A024171
- Numbers k such that k^2 is palindromic in base 7.at n=39A029992
- 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 49.at n=19A031547
- Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 49.at n=1A031727
- Base-7 palindromes that start with 4.at n=16A043018
- Numbers whose cube is palindromic in base 7.at n=14A046237
- Numbers k such that sigma(k) - k = k - pi(k) - 1 where pi(k) is A000720.at n=9A048884
- Numbers n such that 249*2^n-1 is prime.at n=16A050883
- G.f.: -x*(1-2*x+2*x^2)/(2*x^3-4*x^2+4*x-1).at n=10A078484
- Even numbers n such that 37^2 (the square of the first irregular prime) divides the numerator of Bernoulli(n).at n=17A090789
- Even numbers n such that N(n) is divisible by a nontrivial square, say m^2 with gcd(n,m) = 1, where N(n) is the numerator of the Bernoulli number B(n). The smallest numbers m are given in A094095.at n=16A090943
- Position where n (presumably) appears the last time in A107261, or 0 if n keeps appearing.at n=13A107262
- Indices of products of twin primes in the semiprimes.at n=14A131188
- Choulet-Curtz triangle with T(0,0)=1, T(n,n)=T(n,0).at n=55A158524
- Choulet-Curtz triangle with T(0,0)=1, T(n,n)=T(n,0).at n=65A158524
- Number of binary strings of length n with no substrings equal to 0001 0011 or 0111.at n=15A164455
- Index k of the semiprime A001358(k) = prime(n) * prime(n+1).at n=44A172348
- Number of (n+1)X(1+1) 0..2 arrays colored with the maximum plus the lower median of every 2X2 subblock.at n=3A236712
- Number of (n+1) X (4+1) 0..2 arrays colored with the maximum plus the lower median of every 2 X 2 subblock.at n=0A236715