4183
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 4320
- Proper Divisor Sum (Aliquot Sum)
- 137
- 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
- 4048
- Möbius Function
- 1
- Radical
- 4183
- 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
- 38
- 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
- 11*n^2 + 11*n + 3.at n=19A006222
- Consider a 2-D cellular automaton generated by the Schrandt-Ulam rule of A170896, but confined to a semi-infinite strip of width n, starting with one ON cell at the top left corner; a(n) is the period of the resulting structure.at n=41A006447
- Number of rotationally symmetric polyominoes with n cells (that is, polyominoes with exactly the symmetry group C_2 generated by a 180-degree rotation).at n=16A006747
- Coordination sequence T4 for Zeolite Code EUO.at n=40A008099
- Coordination sequence T3 for Zeolite Code LAU.at n=46A008126
- Base-7 Armstrong or narcissistic numbers (written in base 10).at n=18A010350
- Numbers k such that sigma(k) = sigma(k+4).at n=8A015863
- Numbers k such that sigma(k) = sigma(k+6).at n=18A015866
- Pisot sequence L(4,5).at n=16A018910
- Pisot sequence L(7,10).at n=14A020743
- a(n) = least m such that if r and s in {1/1, 1/3, 1/5, ..., 1/(2n-1)} satisfy r < s, then r < k/m < (k+4)/m < s for some integer k.at n=21A024847
- 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 63.at n=18A031561
- Dirichlet convolution of d(n) (number of divisors) with Fibonacci numbers.at n=18A034772
- Numbers whose base-8 representation has exactly 5 runs.at n=13A043627
- Numbers whose base-4 representation contains exactly two 0's and four 1's.at n=11A045027
- Pisot sequence L(5,7).at n=15A048584
- Sum_{i=0..n} (C(n,i) mod 2)*Fibonacci(2i+3) = FL(n+3)Product(L(2^i)^bit(n,i),i=0..).at n=8A050612
- a(n) = a(n-1) + n^2 if n prime else a(n-1) - n, starting with a(0) = 0.at n=38A051353
- Concatenation of n in base 10 down up to base 2 is prime, all numbers are interpreted as decimals.at n=36A054257
- (n - phi(n)) | sigma(n) for composite n not congruent to 2 (mod 4).at n=15A055164