4469
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
- 4
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 4620
- Proper Divisor Sum (Aliquot Sum)
- 151
- 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
- 4320
- Möbius Function
- 1
- Radical
- 4469
- 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
- 46
- 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
- Coordination sequence T1 for Zeolite Code FER.at n=41A008106
- Numbers k such that the continued fraction for sqrt(k) has period 25.at n=18A020364
- a(n)-th nonsquarefree is sum of first k nonsquarefrees for some k.at n=43A020644
- Fibonacci sequence beginning 3, 10.at n=14A022122
- Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted then there are a pair of central terms both equal to 5.at n=24A031418
- Numerators of continued fraction convergents to sqrt(790).at n=4A042522
- Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 9.at n=10A051974
- Consider all integer triples (i,j,k), j,k>0, with i^3=j^3+binomial(k+2,3), ordered by increasing i; sequence gives j values.at n=15A054235
- a(n) = n times the Collatz number of n (as given in A006577).at n=40A058261
- a(n) = (A085249(n) - 1)/6.at n=11A088349
- Numbers k such that 6^k - 5^(k-1) is prime.at n=28A093713
- Number of cubes that can be formed from the points of a cubical grid of n X n X n points.at n=10A098928
- Numbers k such that p1=2k+3, p2=4k+5 and p3=6k+7 are all prime.at n=44A105652
- Semiprimes with semiprime digits (digits 4, 6, 9 only).at n=16A107342
- Numbers with semiprime digits (digits 4, 6, 9 only).at n=44A107665
- Maximal number of squares of side 1 in an ellipse of semiaxes n,2n.at n=26A108126
- Numbers n such that (2^p + 1)/3 is prime, where p is the n-th prime.at n=29A123176
- (Sum of the squares of the quadratic nonresidues of prime(n)) / prime(n).at n=34A125618
- Triangle read by rows: T(n,k) is the number of deco polyominoes of height n with k cells in the second row (0<=k<=n-1; a deco polyomino is a directed column-convex polyomino in which the height, measured along the diagonal, is attained only in the last column).at n=31A134436
- Numbers k such that k and k^2 use only the digits 1, 4, 6, 7 and 9.at n=8A137053