9063
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 14040
- Proper Divisor Sum (Aliquot Sum)
- 4977
- 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
- 5616
- Möbius Function
- 0
- Radical
- 3021
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 3
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
- 91
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- 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
- Powers of fifth root of 11 rounded down.at n=19A018144
- Powers of fifth root of 11 rounded to nearest integer.at n=19A018145
- Least term in period of continued fraction for sqrt(n) is 5.at n=31A031429
- Numbers k such that 75*2^k+1 is prime.at n=34A032387
- Take pairs (x,y) with Sum_{j = x..y} j = concatenation of x and y. Sort pairs on y then x. This sequence gives x of each pair.at n=31A070152
- Number of 5-tuples (v1,v2,v3,v4,v5) of nonnegative integers less than n such that v1 <= v4, v1 <= v5, v2 <= v4, v2 <= v5 and v3 <= v4.at n=8A085463
- The two digits touching the first comma have as absolute difference 0. The next such difference is 1. The next one is 2. Then 3, 4, 5... etc. When we reach 9 the differences start a new cycle: 0, 1, 2, 3... etc. Among many such possible sequences, this is the slowest increasing one starting with "1".at n=46A098795
- Triangle read by rows: T(n,k) (k>=0) is the number of RNA secondary structures of size n (i.e., with n nodes) having k arcs that are covered by other arcs.at n=48A110317
- Odd interprimes divisible by 19.at n=22A126231
- a(n) = 25*n^2 + 2*n.at n=18A154377
- Multiples of 19 whose reversal + 1 is also a multiple of 19.at n=27A166392
- The (2^n)-th lucky number.at n=10A181383
- Number of regions in a complete but borderless regular polygon.at n=18A191101
- Numbers k such that (2^k + k + 1)*2^k + 1 is prime.at n=16A201356
- Number of (w,x,y,z) with all terms in {1,...,n} and w >= harmonic mean of {x,y,z}.at n=11A212107
- Numbers k such that 25*k+1 is a square.at n=38A219259
- Number of primes of the form (x+1)^11 - x^11 having n digits.at n=54A221984
- Number of compositions of n avoiding the pattern 111.at n=18A232432
- Alternating square row sums of the table A072233 (A008284).at n=29A238313
- Numbers k such that the average of the divisors of k and k+1 is the same.at n=8A238380