16589
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 29
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 16956
- Proper Divisor Sum (Aliquot Sum)
- 367
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 16224
- Möbius Function
- 1
- Radical
- 16589
- 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
- 40
- 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
- Pseudoprimes to base 6.at n=35A005937
- Pseudoprimes to base 33.at n=38A020161
- Pseudoprimes to base 35.at n=34A020163
- Pseudoprimes to base 39.at n=33A020167
- Strong pseudoprimes to base 8.at n=15A020234
- Strong pseudoprimes to base 35.at n=9A020261
- Strong pseudoprimes to base 39.at n=12A020265
- Strong pseudoprimes to base 44.at n=15A020270
- Strong pseudoprimes to base 64.at n=40A020290
- Strong pseudoprimes to base 71.at n=15A020297
- Numbers k such that 113*2^k+1 is prime.at n=20A032406
- a(n) = (2*n+1)*(12*n+1).at n=26A033576
- Values of e, the lesser key or generating number for Pythagorean triangles in which S (the odd short leg) and U (the hypotenuse) are twin primes.at n=38A051892
- Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 15.at n=19A051980
- Numbers n such that n^2 = 29*k^2 + 29*k +1, k sequence = A104652.at n=2A104651
- Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1000-1111-1000 pattern in any orientation.at n=14A146415
- 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, -1, 1), (-1, 1, 1), (0, 0, -1), (1, 0, 1), (1, 1, -1)}.at n=8A149408
- Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 4,5,2,0,1,1,0 for x=0,1,2,3,4,5,6.at n=5A197941
- Triangle of coefficients of polynomials v(n,x) jointly generated with A210755; see the Formula section.at n=42A210756
- Number of partitions of 2^n into three distinct primes.at n=21A214844