3659
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 23
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 3660
- Proper Divisor Sum (Aliquot Sum)
- 1
- 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
- 3658
- Möbius Function
- -1
- Radical
- 3659
- Omega Function (Ω)
- 1
- Little Omega Function (ω)
- 1
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
- yes
- Composite Number
- no
- Semiprime
- no
- Squarefree Number
- yes
- Prime Power
- yes
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Prime Index
- 511
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Primes of the form k^2 - k - 1.at n=34A002327
- Symmetries in unrooted 3-trees on n+1 vertices.at n=14A003612
- Coordination sequence T3 for Zeolite Code LTN.at n=42A008142
- Coordination sequence T2 for Zeolite Code DFO.at n=46A009876
- Pisot sequence E(10,21), a(n) = floor( a(n-1)^2/a(n-2)+1/2 ).at n=8A014007
- Numbers k such that the continued fraction for sqrt(k) has period 50.at n=15A020389
- Primes that remain prime through 2 iterations of the function f(x) = 3*x + 2.at n=40A023246
- a(n) = (Sum_{i=0..n-1} (-1)^i/b(i)) * LCM{b(i): i=0..n-1}, where b(i) = C(i,floor(i/2)).at n=12A025554
- Sequence satisfies T^2(a)=a, where T is defined below.at n=48A027591
- Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 13 (most significant digit on right).at n=17A029506
- 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 59.at n=18A031557
- Lower prime of a difference of 12 between consecutive primes.at n=37A031930
- Upper prime of a difference of 16 between consecutive primes.at n=11A031935
- Numbers k such that 51*2^k+1 is prime.at n=27A032375
- Primes of form x^2+59*y^2.at n=22A033238
- Multiplicity of highest weight (or singular) vectors associated with character chi_79 of Monster module.at n=36A034467
- Smallest number that takes n steps to reach 0 under "k->min product of 2 numbers whose concatenation is k".at n=10A035933
- Coordination sequence T8 for Zeolite Code STT.at n=40A038418
- Primes p such that Ramanujan function tau(p) is divisible by 13.at n=30A038543
- Smallest k>1 such that k(p-1)-1 is divisible by p^2, p=n-th prime.at n=17A039914