7934
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
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 11904
- Proper Divisor Sum (Aliquot Sum)
- 3970
- 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
- 3966
- Möbius Function
- 1
- Radical
- 7934
- 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
- 52
- 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
- Number of inequivalent strong starters in cyclic group of order 2n+1.at n=11A006205
- 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 88.at n=13A031586
- Concatenate n-th prime and n-th composite.at n=21A038530
- Numbers whose base-4 representation contains exactly two 2's and four 3's.at n=23A045147
- Number of partitions of n with equal number of even and odd parts.at n=47A045931
- Numbers k such that 285*2^k-1 is prime.at n=38A050901
- Numbers k such that A001414(k) is a square and sets a new record for squares.at n=22A064463
- n times n+1 gives the concatenation of two numbers m and m-5.at n=3A116251
- Number of doubletons in all partitions of n. By a doubleton in a partition we mean an occurrence of a part exactly twice (the partition [4,(3,3),2,2,2,(1,1)] has two doubletons, shown between parentheses).at n=33A116646
- Binomial transform of the "1,2,3,..." triangle.at n=46A125027
- Number of binary words of length n containing at least one subword 10^{6}1 and no subwords 10^{i}1 with i<6.at n=40A143286
- a(n) = 529*n - 1.at n=14A158365
- Numbers m such that m^2 is an anagram of a Fibonacci number.at n=12A162391
- Number of (n+1) X 2 binary arrays with no 2 X 2 subblock determinant equal to any horizontal or vertical neighbor 2 X 2 subblock determinant.at n=7A185459
- Number of (n+1) X 9 binary arrays with no 2 X 2 subblock determinant equal to any horizontal or vertical neighbor 2 X 2 subblock determinant.at n=0A185466
- T(n,k)=Number of (n+1)X(k+1) binary arrays with no 2X2 subblock determinant equal to any horizontal or vertical neighbor 2X2 subblock determinant.at n=28A185467
- T(n,k)=Number of (n+1)X(k+1) binary arrays with no 2X2 subblock determinant equal to any horizontal or vertical neighbor 2X2 subblock determinant.at n=35A185467
- Number of 3 X 3 X 3 triangular 0..n arrays with every horizontal row nondecreasing and having the same average value.at n=22A214907
- Semiprimes of the form (2^k - m)*(m*2^k - 1).at n=13A239038
- Number T(n,k) of compositions of n such that k is the minimal distance between two identical parts; triangle T(n,k), n>=2, 1<=k<=floor((sqrt(8*n-7)-1)/2), read by rows.at n=51A261981