6433
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 7360
- Proper Divisor Sum (Aliquot Sum)
- 927
- 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
- 5508
- Möbius Function
- 1
- Radical
- 6433
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 62
- 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
- sec(log(x+1)-sinh(x))=1+3/4!*x^4-10/5!*x^5+100/6!*x^6-693/7!*x^7...at n=8A013268
- Expansion of e.g.f. exp(arctan(x)/exp(x)).at n=8A013571
- Pseudoprimes to base 52.at n=23A020180
- Pseudoprimes to base 53.at n=46A020181
- Numbers k such that the continued fraction for sqrt(k) has period 86.at n=13A020425
- Number of n-move bishop paths on 8x8 board from given corner to any square.at n=4A025592
- Number of partitions of n with equal nonzero number of parts congruent to each of 0 and 2 (mod 4).at n=42A035547
- Sizes of successive balls in D_4 lattice.at n=25A046949
- a(n) = 2*prime(n)^2 - prime(n+1)^2.at n=23A064051
- a(n) = number of n-digit base-3 biquams.at n=8A064686
- a(n) = floor(2^n*Pi).at n=12A068425
- a(1) = 1; a(n) is smallest number > a(n-1) such that the juxtaposition a(1)a(2)...a(n) is a prime.at n=46A074336
- a(0)=1; a(n) = 3^n - 2^(n-1) for n >= 1.at n=8A083313
- Map from binary trees of size n to the set of corresponding trivalent plane trees (tpt) represented as size 2n+1 general trees.at n=21A083930
- Duplicate of A068425.at n=11A088970
- Semiprimes that are the sum of the first n semiprimes for some n.at n=20A092190
- a(n) = floor(7^n/2^n).at n=7A094970
- Total number of parts in all compositions of n into distinct odd parts.at n=36A097936
- Numbers k such that the concatenation of k with k+8 gives a square.at n=1A115429
- a(n) = dimension of the space in which the sphere of radius n is of maximum volume.at n=31A121546