8186
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
- 5
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 12282
- Proper Divisor Sum (Aliquot Sum)
- 4096
- 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
- 4092
- Möbius Function
- 1
- Radical
- 8186
- 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
- 65
- 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
- Smallest nonnegative number that is the sum of 3 squares in exactly n ways.at n=37A000437
- Numbers k such that phi(k + 6) | sigma(k) + 6.at n=8A015872
- Numbers k such that the continued fraction for sqrt(k) has period 35.at n=18A020374
- a(n) is the smallest number that is the sum of 3 nonzero squares in exactly n ways.at n=36A025414
- Least sum of 3 distinct nonzero squares in exactly n ways.at n=36A025415
- Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted then there are a pair of central terms both equal to 5.at n=42A031418
- Positive numbers having the same set of digits in base 6 and base 9.at n=41A037436
- Numerators of continued fraction convergents to sqrt(825).at n=10A042592
- Numbers whose base-4 representation contains exactly two 2's and four 3's.at n=29A045147
- Nonprime numbers k such that sum of aliquot divisors of k is a cube.at n=29A048698
- Closed 3-dimensional ball numbers (version 2): a(n)= number of integer points (i,j,k) contained in a closed ball of diameter n, centered at (1/2,0,0).at n=25A053593
- McKay-Thompson series of class 29A for Monster.at n=31A058611
- Number of r-bicoverings (or restricted proper 2-covers) of an n-set.at n=6A060053
- Numbers k that, when expressed in base 5 and then interpreted in base 7, give a multiple of k.at n=8A062929
- Let A denote the sequence; A is equal to the union of the self-convolutions A^2 and A^3, with terms in ascending order by size.at n=28A090845
- Least positive number having exactly n partitions into three squares.at n=37A095809
- Number of partitions of n into parts each of which is used a different number of times.at n=46A098859
- A good sequence of gaps for Shellsort, found by genetic programming.at n=9A112263
- Number of bits required to represent binomial(2^n, 2^(n-1)).at n=13A112884
- Semiprimes that are semiprimes turned upside-down.at n=44A119738