9443
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 11520
- Proper Divisor Sum (Aliquot Sum)
- 2077
- 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
- 7560
- Möbius Function
- -1
- Radical
- 9443
- Omega Function (Ω)
- 3
- 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
- 122
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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
- Numbers k such that 13*2^k - 1 is prime.at n=9A001773
- Numbers whose base-5 representation contains exactly two 0's and three 3's.at n=27A045198
- a(n) = (1/6)*(n^3 + 21*n^2 + 74*n + 18).at n=32A103145
- Row sums of triangle A115237.at n=24A115238
- Positions of 11's in A131744.at n=4A133152
- Number of 2-sided triangular strip polyedges with n cells.at n=7A151541
- Products of 3 distinct non-Sophie Germain primes.at n=40A157347
- a(n) = n-th odd nonprime * n-th odd number.at n=35A163506
- Number of Golomb rulers of length n.at n=31A169942
- Partial sums of A024770.at n=27A173057
- (Average of twin balanced prime pairs)/10.at n=34A173893
- Number of representations of n in the form sum(i=1..n, c(i)/i ), where each of the c(i)'s is in {0,1,...,n}.at n=7A185074
- Number of (w,x,y) with all terms in {0,...,n} and w<=x+y and x<=y.at n=27A212983
- a(n) is the smallest m for which the decimal representation of 11^m contains n consecutive identical digits.at n=8A215731
- 3^n mod 10000.at n=25A216097
- a(n) is the least value of k such that the decimal expansion of n^k contains nine consecutive identical digits.at n=9A217164
- -7-Knödel numbers.at n=16A225511
- Number of (n+2)X(3+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 3 5 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 3 5 6 or 7.at n=4A252143
- Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 3 5 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 3 5 6 or 7.at n=2A252145
- T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 3 5 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 3 5 6 or 7.at n=23A252148