1694
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 3192
- Proper Divisor Sum (Aliquot Sum)
- 1498
- 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
- 660
- Möbius Function
- 0
- Radical
- 154
- 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
- 34
- 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
- yes
- Odd
- no
Appears in sequences
- Number of nontrivial Baxter permutations of length 2n-1.at n=6A001183
- Number of walks on cubic lattice.at n=13A005570
- Numbers k such that sigma(x) = k has exactly 3 solutions.at n=45A007372
- Coordination sequence T4 for Zeolite Code BRE.at n=27A008061
- Coordination sequence T10 for Zeolite Code MFI.at n=26A008162
- Coordination sequence T2 for Zeolite Code AFX.at n=31A009865
- Smallest positive number that can be written as sum of distinct Fibonacci numbers in n ways.at n=32A013583
- Sum_{1<=k<n} gcd(k!,n!/k!).at n=10A014454
- Numbers with exactly 5 2's in their ternary expansion.at n=30A023703
- a(n) = [ n/{n*sqrt(7)} ], where {x} := x - [ x ].at n=30A024563
- a(n) = [ n/{n*sqrt(7)} ], where {x} := x - [ x ].at n=61A024563
- a(n) = Sum_{k=0..2*n-2} T(n, k)*T(n, k+2), T given by A027960.at n=3A027986
- Clog sequence in base 2. Right to left concatenation of n,int(log_2(n)),int(log_2(int(log_2(n)))),... in base 2.at n=29A028423
- Numbers k such that k*(k + 9) is a palindrome.at n=11A028570
- Floor( 7*n^2/2 ).at n=22A032525
- Numbers that can be expressed as the product of three 2-digit numbers.at n=20A033830
- Dirichlet convolution of b_n=2^(n-1) with Catalan numbers.at n=8A034739
- BIK(b)-b where b is A035082.at n=12A035084
- Denominators of continued fraction convergents to sqrt(479).at n=6A041915
- Convolution of Catalan numbers A000108(n+1), n >= 0, with A038846.at n=3A042940