9235
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
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 11088
- Proper Divisor Sum (Aliquot Sum)
- 1853
- 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
- 7384
- Möbius Function
- 1
- Radical
- 9235
- 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
- 109
- 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
- Number of triangular polyominoes (or triangular polyforms, or polyiamonds) with n cells (turning over is allowed, holes are allowed, must be connected along edges).at n=12A000577
- a(n) = (d(n)-r(n))/5, where d = A026049 and r is the periodic sequence with fundamental period (4,1,4,0,1).at n=47A026051
- Least term in period of continued fraction for sqrt(n) is 9.at n=11A031433
- Number of binary [ n,3 ] codes without 0 columns.at n=27A034344
- Number of partitions of n with equal number of parts congruent to each of 0 and 2 (mod 4).at n=43A035541
- Numerators of continued fraction convergents to sqrt(35).at n=6A041058
- Numbers k such that k^2 contains only digits {2,5,8}.at n=4A053926
- Squares of 1 and primes, written backwards.at n=21A060998
- Numbers which have more different digits than their squares.at n=42A061277
- Number of polyhexes with n cells that tile the plane by 180-degree rotation (Conway criterion).at n=9A075211
- Row sums of A095167.at n=24A095170
- Odd squares written backwards and sorted.at n=39A107313
- Semiprimes whose digit reversal is a nontrivial power.at n=24A108849
- Semiprimes (A001358) whose digit reversal is a powerful(1) number (A001694).at n=30A115688
- Semiprimes (A001358) whose digit reversal is a square.at n=20A115710
- Irregular array where the n-th row are the divisors, not occurring earlier in the sequence, of the sum of the terms in all previous rows. a(1)=2.at n=49A120576
- Number of ways to build a contiguous building with n LEGO blocks of size 1 X 8 on top of a fixed block of the same size so that the building is symmetric after a rotation by 180 degrees.at n=4A123815
- Binomial transform of [1, 3, 4, 3, 2, 0, 0, 0, ...].at n=18A136395
- Numbers k such that k and k^2 use only the digits 2, 3, 5, 8 and 9.at n=8A137086
- Odd positive integers a(n) such that for every odd integer m>=7 there exists a unique representation of the form m=a(p)+2a(q)+4a(r).at n=27A147845