9369
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 27
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 13920
- Proper Divisor Sum (Aliquot Sum)
- 4551
- 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
- 6228
- Möbius Function
- 0
- Radical
- 1041
- Omega Function (Ω)
- 4
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 60
- 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
- Number of nonequivalent dissections of an n-gon by nonintersecting diagonals up to rotation.at n=8A003455
- Numbers k such that the continued fraction for sqrt(k) has period 88.at n=19A020427
- Sets of 4 consecutive numbers with equal number of divisors.at n=30A039665
- Number of integers k not exceeding 2^n such that the cube of number of divisors [A000005(k)] is larger than k.at n=17A056764
- Numbers n such that n | 11^n + 10^n + 9^n + 8^n + 7^n.at n=39A057251
- Numbers k such that gcd(k, reverse(k)) = 27 = 3^3, where reverse(x) = A004086(x).at n=38A072016
- Numbers k such that the k-th term of the EKG sequence (A064413(k)) has more than one controlling prime.at n=38A073735
- Iccanobirt numbers (9 of 15): a(n) = R(a(n-1) + a(n-2) + R(a(n-3))), where R is the digit reversal function A004086.at n=14A102119
- Numbers k such that 10^k*(10^7*(-1+10^k)+6083806) + 10^k - 1 is prime.at n=7A107291
- Integer part of the volume of a regular tetrahedron with edge length n.at n=42A171973
- Positive integers of the form (2*m^2+1)/11.at n=41A179088
- Numbers whose arithmetic derivatives are a permutation of their digits.at n=16A225902
- Numbers n such that n^8+8 and n^8-8 are prime.at n=13A239503
- Sum of numbers in the n-th antidiagonal of the reciprocity array of 3.at n=33A259583
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 225", based on the 5-celled von Neumann neighborhood.at n=24A270944
- Indices m of "late birds", i.e., values a(m) < a(k) for all k > m, in A075771 = quotient + remainder in Euclidean division of n^2 by prime(n).at n=29A277853
- Number of 2 X 2 matrices with all terms in {0,1,...,n} and (sum of terms) = determinant.at n=47A280588
- Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 382", based on the 5-celled von Neumann neighborhood.at n=27A287950
- a(n) = n + 2*cos((n*Pi)/3) + Lucas(n).at n=18A297661
- Number of chordless cycles in the n-web graph.at n=16A297665