4879
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 28
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- yes
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 6048
- Proper Divisor Sum (Aliquot Sum)
- 1169
- 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
- 3840
- Möbius Function
- -1
- Radical
- 4879
- Omega Function (Ω)
- 3
- 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
- 134
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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
- Kaprekar numbers: positive numbers n such that n = q+r and n^2 = q*10^m+r, for some m >= 1, q >= 0 and 0 <= r < 10^m, with n != 10^a, a >= 1.at n=10A006886
- Coordination sequence T6 for Zeolite Code DDR.at n=44A008076
- Number of segments created by diagonals of n-gon.at n=14A014629
- Numbers having period-4 6-digitized sequences.at n=20A031197
- 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 69.at n=11A031567
- Smallest integer not the sum of powers of some earlier terms.at n=9A034875
- Can express a(n) with the digits of a(n)^2 in order, only adding plus signs.at n=39A038206
- Denominators of continued fraction convergents to sqrt(285).at n=7A041537
- Numbers whose base-4 representation contains exactly three 0's and three 3's.at n=14A045079
- Number of factorizations with 2 levels of parentheses indexed by prime signatures. A050338(A025487).at n=30A050339
- The full list of 5-Kaprekar numbers.at n=1A053396
- a(n) = Sum_{d|n} d*prime(d).at n=32A061150
- Sum of digits = 7 times number of digits.at n=47A061424
- Numbers k that divide the number formed by the first k decimal digits of e (A039920(k)).at n=7A065977
- Number of ordered triples (a, b, c) with gcd(a, b, c) = 1 and 1 <= {a, b, c} <= n.at n=17A071778
- Consider all Pythagorean triples (Y-7,Y,Z); sequence gives Y values.at n=13A076295
- a(1) = 1; a(n) = Sum_{k=1..n-1} a(floor((n-1)/k)).at n=37A078346
- A Chebyshev S-sequence with Diophantine property.at n=3A078366
- Nonprimes k that divide (Fibonacci(k^2)-1).at n=38A086504
- Numbers k that divide Lucas(k) + 1.at n=19A094398