3327
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 15
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 4440
- Proper Divisor Sum (Aliquot Sum)
- 1113
- 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
- 2216
- Möbius Function
- 1
- Radical
- 3327
- 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
- 74
- 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
- Double-bitters: only even length runs in binary expansion.at n=47A001196
- Coordination sequence T1 for Zeolite Code AEL.at n=38A008004
- Coordination sequence T6 for Zeolite Code MEL.at n=37A008155
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite BEA = Beta Na7[Al7Si57O128] starting with a T9 atom.at n=11A019075
- a(n) = position of n^3 + 9 in A003072.at n=30A024971
- Coordination sequence T5 for Zeolite Code MWW.at n=39A024990
- Numbers whose base-4 representation has 4 fewer 0's than 3's.at n=31A031469
- 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 19.at n=21A031517
- Numbers whose set of base-6 digits is {2,3}.at n=39A032806
- Coordination sequence T2 for Zeolite Code SBT.at n=46A033613
- Sums of 10 distinct powers of 2.at n=21A038461
- Numbers whose base-5 representation has exactly 6 runs.at n=33A043606
- Numbers n such that string 2,7 occurs in the base 10 representation of n but not of n-1.at n=37A044359
- Numbers n such that string 2,7 occurs in the base 10 representation of n but not of n+1.at n=37A044740
- a(n) = T(2, n), where T is the array given by A047858.at n=9A047859
- a(n)=a(n-1)+a(n-2)-d, where d=a(n/3) if 3 divides n, else d=0; 2 initial terms.at n=19A050193
- Numbers k such that 285*2^k-1 is prime.at n=25A050901
- a(n)=[A*a(n-1)+B*a(n-2)+C]/p^r, where p^r is the highest power of p dividing [A*a(n-1)+B*a(n-2)+C], A=1.0001, B=1.0001, C=1.5, p=2.at n=45A053522
- T(n,n-3), array T as in A054106.at n=26A054107
- Row sums of array T as in A055215.at n=25A054405