9326
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
- 4
- Divisor Sum
- 13992
- Proper Divisor Sum (Aliquot Sum)
- 4666
- 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
- 4662
- Möbius Function
- 1
- Radical
- 9326
- 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
- yes
- 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
- yes
- Odd
- no
Appears in sequences
- (n-th Lucas number that is not 1) - (n-th number that is 1 or not a Lucas number).at n=17A014244
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 96.at n=7A031594
- Number of partitions of 5n such that cn(1,5) = cn(4,5) < cn(2,5) = cn(3,5) <= cn(0,5).at n=12A036891
- Number of arcs covered by other arcs in all RNA secondary structures of size n+5 (i.e., with n+5 nodes).at n=8A110318
- Integers 1 through n written in primorial base, summed as if decimal.at n=30A122613
- Number of base 12 circular n-digit numbers with adjacent digits differing by 6 or less.at n=4A125400
- 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, 0, 0), (0, 0, 1), (1, 0, -1), (1, 1, -1)}.at n=9A148690
- a(n) = 49*n^2 - 20*n + 2.at n=13A157373
- Total number of '1' bits in the terms of 'rows' of A178746.at n=11A178748
- Numbers n such that Q(sqrt(n)) has class number 7.at n=32A218039
- Number of compositions of n with exactly four occurrences of the largest part.at n=16A243739
- Numbers k such that 7*R_(k+2) - 2*10^k is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=13A257031
- Numbers n such that the decimal expansions of both n and n^2 have 2 as smallest digit and 9 as largest digit.at n=39A257485
- Number of partitions of (2, n) into a sum of distinct pairs.at n=31A268345
- Number of nX3 0..1 arrays with every element unequal to 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.at n=13A304258
- Number of nonempty subsets of {1, ..., n} containing no three cyclically successive elements.at n=15A306357
- Number of (marked) cyclic n-bit binary strings containing no runs of length > 3.at n=14A316699
- Number of 3-regular bipartitions of n.at n=21A328547
- a(n) is the number of vertices formed by n-secting the angles of a pentagon.at n=41A335554
- Number of partitions of n whose greatest part is a multiple of 4.at n=40A363046