3469
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 22
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 3470
- 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
- 3468
- Möbius Function
- -1
- Radical
- 3469
- 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
- 30
- 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
- yes
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Prime Index
- 487
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- A variant of the cuban primes: primes p = (x^3 - y^3)/(x - y) where x = y + 2.at n=8A002648
- Coordination sequence T2 for Zeolite Code MEP.at n=35A008158
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite NES = NU-87 H4[Al4Si64O136].nH2O starting with a T7 atom.at n=11A019208
- a(n) = least m such that if r and s in {1/3, 1/6, 1/9,..., 1/3n} satisfy r < s, then r < k/m < s for some integer k.at n=38A024824
- Coordination sequence T2 for Zeolite Code MWW.at n=39A024987
- Palindromic primes in base 16 (or hexadecimal), but written here in base 10.at n=36A029732
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 44 ones.at n=2A031812
- Primes of form x^2+95*y^2.at n=23A033206
- Value of D for incrementally largest values of minimal x satisfying Pell equation x^2-Dy^2=1.at n=24A033316
- Smallest prime == 1 mod (n^2).at n=16A035091
- Smallest prime == 1 mod (n^2).at n=33A035091
- Expansion of Sum_{n>=0} (q^n / Product_{k=1..n+5} (1 - q^k)).at n=23A035301
- Let F(n) = Q(n) - P(n) be the Fortunate numbers (A005235); sequence gives n such that F(n) = prime(n+1).at n=14A035346
- Base 4 digits are, in order, the first n terms of the periodic sequence with initial period 3,1,2,0.at n=5A037779
- Numbers k such that the string 7,4 occurs in the base 9 representation of k but not of k-1.at n=46A044318
- Numbers n such that string 6,9 occurs in the base 10 representation of n but not of n-1.at n=37A044401
- Numbers n such that string 4,6 occurs in the base 10 representation of n but not of n+1.at n=38A044759
- Numbers n such that string 6,9 occurs in the base 10 representation of n but not of n+1.at n=37A044782
- n plus a googol is prime.at n=9A049014
- a(n)=T(n,n), array T as in A049723.at n=33A049728