5677
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 25
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 6496
- Proper Divisor Sum (Aliquot Sum)
- 819
- 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
- 4860
- Möbius Function
- 1
- Radical
- 5677
- 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
- 129
- 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
- Hex (or centered hexagonal) numbers: 3*n*(n+1)+1 (crystal ball sequence for hexagonal lattice).at n=43A003215
- Numbers ending with '7' that are the difference of two positive cubes.at n=30A038862
- Numbers having three 7's in base 9.at n=14A043483
- Expansion of (1-x)/(1-x-2x^2+x^4).at n=15A052969
- Composite n such that the sums of the composite numbers up to n, +/- 1, are twin primes.at n=34A065022
- Consider the family of multigraphs enriched by the species of odd sets. Sequence gives number of those multigraphs with n loops and edges.at n=5A098637
- Semiprimes in A003215.at n=15A113530
- Smaller of two consecutive semiprimes with the same digital root.at n=37A118699
- The (1,4)-entry in the matrix M^n, where M is the 4 X 4 matrix {{0, -1, -1, 1}, {1, -1, 0, 0}, {0, 1, 1, 0}, {0, 0, 1, 1 }}.at n=32A122789
- Sums of three consecutive hexagonal numbers.at n=30A129109
- Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 0100-0100-1111 pattern in any orientation.at n=14A146574
- a(n) = n^3 + sum((-1)^j*a(j)); for j=1 to n-1; a(1)=1.at n=43A153286
- a(n) = 12*n^2 + 18*n + 7.at n=21A154105
- Composite numbers n such that 8*n^2-2*n-1 divides the primitive part U(n) of Fibonacci(n).at n=8A159234
- Positive numbers n such that 8*n^2-2*n-1 divides Fibonacci(n).at n=32A159259
- Cuban composites: composite numbers equal to the difference of two consecutive cubes.at n=19A159961
- Number of (n+2)X4 binary arrays avoiding patterns 001 and 111 in rows and columns.at n=3A202372
- Number of (n+2)X6 binary arrays avoiding patterns 001 and 111 in rows and columns.at n=1A202374
- T(n,k)=Number of (n+2)X(k+2) binary arrays avoiding patterns 001 and 111 in rows and columns.at n=13A202378
- T(n,k)=Number of (n+2)X(k+2) binary arrays avoiding patterns 001 and 111 in rows and columns.at n=11A202378