5579
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
- 5
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 6384
- Proper Divisor Sum (Aliquot Sum)
- 805
- 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
- 4776
- Möbius Function
- 1
- Radical
- 5579
- 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
- 41
- 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
- Partial sums of A011863.at n=12A011888
- Convolution of A000201 with itself.at n=22A023663
- Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 8 (most significant digit on right).at n=11A029501
- Numbers having period-2 6-digitized sequences.at n=12A031357
- Composite numbers whose prime factors have no digits other than 7's and 9's.at n=7A036324
- Number of primes < n^3.at n=37A038098
- Bisection of A028289.at n=40A038390
- Triangles in open triangular matchstick arrangement (triangle minus one side) of side n.at n=28A045947
- a(n) = A047881(n) / 2.at n=30A047882
- Composite and every divisor (except 1) contains the digit 7.at n=25A062676
- CATS sequence: cube-add-then-sort variation of RATS (reverse, add then sort) sequence.at n=41A079320
- Numbers k such that 4*10^k - 9 is prime.at n=9A101396
- Numbers k such that 2^k + 11 is prime.at n=18A102633
- a(n) = 6*n*(n-1) - 1.at n=31A103115
- Expansion of 1 / ((1-x-x^2-x^3)*(1-x-x^3)).at n=13A103321
- Number of n-digit squares with no zero digits, having roots containing at least one zero.at n=9A104317
- Row sums of triangle A110141.at n=7A110143
- Triangle read by rows: T(n,k) is the number of set partitions of {1,2,...,n} in which the size of the last block is k, 1<=k<=n; the blocks are ordered with increasing least elements.at n=59A124496
- a(n) = n*(4*n^2 + n - 1)/2.at n=13A125200
- an=n-th smallest integer of the form m=p1*p2 where pi are odd primes such that d+2m/d are all primes for d dividing 2m.at n=38A128279