6926
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
- 10392
- Proper Divisor Sum (Aliquot Sum)
- 3466
- 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
- 3462
- Möbius Function
- 1
- Radical
- 6926
- 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
- 106
- 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
- yes
- Odd
- no
Appears in sequences
- Numbers k such that 11*2^k - 1 is prime.at n=12A001772
- If a, b in sequence, so is ab+10.at n=34A009368
- a(1) = 5; a(n+1) = a(n)-th nonprime, where nonprimes begin at 1.at n=30A025005
- 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 82.at n=15A031580
- a(n)^2 is a square whose digits occur with an equal minimum frequency of 2.at n=25A052049
- Numbers k such that 273*2^k + 1 is prime.at n=34A053353
- a(n) = n^3 + prime(n).at n=18A089620
- Integers k such that 10^k + 67 is a prime number.at n=12A135113
- Numbers k such that k and k^2 use only the digits 2, 4, 6, 7 and 9.at n=10A137102
- S(n) - the sum of the areas of the polygons constructed from connecting with a straight line all identical members in the multiplicative table modulo n (finite field).at n=21A157023
- a(n) = (1/2)*(n^3 - 6*n^2 + 13*n - 6).at n=25A158498
- Numbers k with squares that are concatenations k^2 = x//y such that x is an anagram of y.at n=2A162945
- Where zeros occur in the 1-0 race in the binary expansion of Pi-3; that is, n such that A174832(n) = 0.at n=28A178980
- Sum of all odd-indexed parts minus the sum of all even-indexed parts of all partitions of n, with the parts written in nondecreasing order.at n=33A194714
- Number of nX5 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,0,3,2,1 for x=0,1,2,3,4.at n=7A196474
- Numbers k such that k!*k!! - 1 is prime.at n=13A202426
- Meandric numbers for a river crossing up to 3 parallel roads at n points.at n=11A204352
- Irregular array T(n,k) of numbers/2 of non-extendable (complete) non-self-adjacent simple paths of each length within a square lattice bounded by rectangles with nodal dimensions n and 9, n >= 2.at n=45A213426
- Numbers k such that k^11 + 11*k + 11^k is prime.at n=11A220787
- Numbers k such that m^2 + k^2/m^2 is prime for every m|k.at n=40A236423