7606
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 11412
- Proper Divisor Sum (Aliquot Sum)
- 3806
- 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
- 3802
- Möbius Function
- 1
- Radical
- 7606
- 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
- 83
- 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
- Values of k at which the period of the continued fraction for sqrt(k) sets a new record.at n=45A013645
- 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 86.at n=13A031584
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 86 ones.at n=0A031854
- Numbers whose maximal base-8 run length is 4.at n=19A037995
- Numbers having four 6's in base 8.at n=1A043448
- Consecutive terms of A065966 which are also consecutive integers.at n=22A065976
- Number of irreducible polynomials (over the rationals) of form a*x^2+b*x+c, 1 <= a,b,c <= n.at n=19A079671
- Sum of the n-th row of A077339.at n=14A081929
- Expansion of 1 / (chi(-x) * chi(-x^7)) in powers of x where chi() is a Ramanujan theta function.at n=51A093950
- a(n)=5a(n-1)+C(n+3,3),n>0, a(0)=1.at n=5A097790
- Matrix inverse of triangle A101275 (number of Schröder paths).at n=50A102051
- Positive integers n such that n^11 + 1 is semiprime.at n=37A105122
- Concatenating n with n+1 (in base 10) gives a number which is the product of 2 palindromes.at n=10A113942
- Numbers k such that sigma(k) plus the k-th prime is a triangular number.at n=26A115907
- Indices in A146326 where records occur.at n=36A146345
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 1), (-1, 1, 1), (0, 1, -1), (0, 1, 0), (1, -1, 0)}.at n=9A148360
- Smallest number k such that the continued fraction expansion of sqrt(k) contains n distinct numbers.at n=21A187142
- Numbers k such that the periodic part of the continued fraction of sqrt(k) has more ones than any smaller k.at n=23A206579
- a(n) = 5*n^2 + 1.at n=39A212656
- Semiprimes of the form 5*n^2 + 1.at n=12A212707