6867
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 27
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 11440
- Proper Divisor Sum (Aliquot Sum)
- 4573
- 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
- 3888
- Möbius Function
- 0
- Radical
- 2289
- Omega Function (Ω)
- 4
- 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
- 150
- 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
- no
- Odd
- yes
Appears in sequences
- Sum of cubes of primes dividing n.at n=37A005064
- a(n) = (d(n)-r(n))/5, where d = A026063 and r is the periodic sequence with fundamental period (1,4,0,0,0).at n=48A026065
- Numbers n such that n divides the (left) concatenation of all numbers <= n written in base 19 (most significant digit on right and removing all least significant zeros before concatenation).at n=19A029536
- If a Fibonacci sequence is formed with first term = number of digits in n and second term = sum of decimal digits in n, then n itself occurs as a term in the sequence after the first two terms.at n=18A038868
- Ruth-Aaron numbers (2): sum of prime divisors of n = sum of prime divisors of n+1 (both taken with multiplicity).at n=17A039752
- Numbers k such that sopf(k) + 1 = sopf(k+1), where sopf(k) = A008472(k).at n=17A064111
- Numbers k such that k and k+1 have the same sum and number of prime divisors (with repetition).at n=0A064351
- Numbers which are sums of two and also sums of three positive cubes.at n=13A085336
- Numbers which are sums of two, three and four cubes.at n=4A085337
- Numbers which are sums of two, three, four and also sums of five cubes.at n=3A085338
- Numbers of the form p^3 + q^3, p, q primes.at n=26A086119
- Number of spindle configurations of n skew lines.at n=9A110888
- Matrix square of triangle A113340.at n=32A113345
- Sums of two distinct prime cubes.at n=20A120398
- Sum of squares of three consecutive primes.at n=13A133529
- Numbers k such that k^6 - 2 and k^6 + 2 are both primes.at n=11A154938
- Numbers n whose square can be represented as a repdigit number in some base less than n.at n=31A158235
- Coefficients of polynomials described below.at n=51A174531
- Number of ordered triples (w,x,y) with all terms in {1,...,n} and 2w^3<x^3+y^3.at n=22A211801
- Number of n-digit 6th powers.at n=25A216656