2799
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
- 3
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 4056
- Proper Divisor Sum (Aliquot Sum)
- 1257
- 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
- 1860
- Möbius Function
- 0
- Radical
- 933
- Omega Function (Ω)
- 3
- 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
- 66
- 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
- Number of stable trees with n nodes.at n=13A003426
- Least k such that first k terms of A022300 contain n more 1's than 2's.at n=16A022302
- Numbers k such that Fibonacci(k) == 34 (mod k).at n=25A023180
- Convolution of natural numbers >= 3 and Fibonacci numbers.at n=12A023552
- Numbers that are the sum of 4 positive cubes in exactly 3 ways.at n=19A025405
- Numbers that are the sum of 4 positive cubes in 3 or more ways.at n=21A025407
- Numbers that are the sum of 4 distinct positive cubes in exactly 2 ways.at n=40A025409
- a(n) = Sum_{k=0..n} (k+1) * A026747(n, n-k).at n=8A027228
- Composite numbers whose prime factors contain no digits other than 1 and 3.at n=48A036303
- Numbers n such that string 5,0 occurs in the base 9 representation of n but not of n-1.at n=38A044296
- Numbers n such that string 7,5 occurs in the base 9 representation of n but not of n-1.at n=37A044319
- Numbers n such that string 9,9 occurs in the base 10 representation of n but not of n-1.at n=27A044431
- Numbers n such that string 5,0 occurs in the base 9 representation of n but not of n+1.at n=38A044677
- Numbers n such that string 2,7 occurs in the base 10 representation of n but not of n+1.at n=30A044740
- Numbers n such that string 7,9 occurs in the base 10 representation of n but not of n+1.at n=30A044792
- Numbers n such that string 9,9 occurs in the base 10 representation of n but not of n+1.at n=27A044812
- Numbers whose base-4 representation contains exactly three 2's and three 3's.at n=1A045151
- Numbers whose base-5 representation contains exactly one 1 and three 4's.at n=36A045254
- Numbers whose base-5 representation contains exactly one 2 and three 4's.at n=31A045284
- Coordination sequence T2 for Zeolite Code AEN.at n=33A047951