6499
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 28
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 6664
- Proper Divisor Sum (Aliquot Sum)
- 165
- 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
- 6336
- Möbius Function
- 1
- Radical
- 6499
- 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
- 137
- 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
- Powers of fifth root of 23 rounded to nearest integer.at n=14A018181
- Powers of fifth root of 23 rounded up.at n=14A018182
- Pseudoprimes to base 96.at n=26A020224
- Cube root of A030697.at n=13A030698
- 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 79.at n=27A031577
- Numerators of continued fraction convergents to sqrt(130).at n=5A041236
- Numerators of continued fraction convergents to sqrt(520).at n=5A041994
- a(n+1)^3 is next smallest nontrivial cube beginning with a(n)^3, initial cube is 27.at n=2A048568
- Denominators of convergents to A058914.at n=19A048818
- Sum of remainders when n-th prime is divided by all preceding integers.at n=42A050482
- a(n) is the smallest k such that (k^3 + 1)/(n^3 + 1) is an integer > 1.at n=18A065964
- a(n) is the smallest positive integer such that no term in S={a(1),...,a(n)}, n>=3, divides the sum of any two other distinct terms of S, after first initializing the sequence with a(1)=3 and a(2)=4.at n=35A068573
- a(n) = Sum_{d|n} phi(d^3).at n=18A068963
- G.f. A(x) satisfies x*A(x)^3 = B(x*A(x^3)) where B(x) = x/(1 - 3*x).at n=10A091190
- Numbers n such that 4^n+3^(n-1) is prime.at n=30A093717
- a(n) = n^3 - n^2 + 1.at n=19A100104
- Semiprimes with semiprime digits (digits 4, 6, 9 only).at n=22A107342
- Number of partitions that are "3-close" to being self-conjugate.at n=38A108962
- Semiprimes of the form 2*n + 1, where n is a square.at n=24A111351
- Triangle of the numerators of the almost-harmonic numbers: n-th term in m-th row is numerator of (sum{k=1 to m} 1/k) - 1/n, 1<=n<=m.at n=39A125900