3681
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 5330
- Proper Divisor Sum (Aliquot Sum)
- 1649
- 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
- 2448
- Möbius Function
- 0
- Radical
- 1227
- 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
- 131
- 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
- Maximal number of pieces obtained by slicing a torus (or a bagel) with n cuts: (n^3 + 3*n^2 + 8*n)/6 (n > 0).at n=27A003600
- Coordination sequence T1 for Zeolite Code AEL.at n=40A008004
- Coordination sequence T3 for Zeolite Code MTT.at n=37A008191
- Coordination sequence T1 for Zeolite Code RTH.at n=42A009893
- Incomplete Gamma Function at -3.at n=8A010843
- Triangle of numbers associated with Genocchi numbers.at n=32A014780
- Triangle of numbers associated with Genocchi numbers.at n=28A014780
- Triangle of numbers associated with Genocchi numbers.at n=24A014782
- Triangle of numbers associated with Genocchi numbers.at n=20A014782
- Triangle of numbers associated with Genocchi numbers.at n=11A014783
- Triangle of numbers associated with Genocchi numbers.at n=13A014783
- Numbers k such that phi(k) + 9 | sigma(k + 9).at n=35A015788
- Expansion of 1/((1-5x)(1-6x)(1-10x)).at n=3A019839
- Numbers k such that the continued fraction for sqrt(k) has period 46.at n=26A020385
- Expansion of Product_{m>=1} (1+q^m)^27.at n=3A022591
- Numbers k such that Fibonacci(k) == 34 (mod k).at n=31A023180
- Values of Newton-Gregory forward interpolating polynomial (1/3)*(2*n-7)*(2*n^2-11*n+18).at n=17A030434
- Values of Newton-Gregory forward interpolating polynomial (1/3)*(2*n - 3)*(2*n^2 - 3*n + 4).at n=15A030441
- Number of ways of placing 2n points on n X n grid so no 3 are in a line (solutions with no symmetry).at n=14A037185
- Numerators of continued fraction convergents to sqrt(766).at n=6A042476