9802
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
- 1
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 16470
- Proper Divisor Sum (Aliquot Sum)
- 6668
- 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
- 4368
- Möbius Function
- 0
- Radical
- 754
- 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
- 135
- 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
- yes
- Odd
- no
Appears in sequences
- Coordination sequence for body-centered tetragonal lattice.at n=35A008527
- Fibonacci sequence beginning 0, 26.at n=14A022360
- Square roots of sums of squares of divisors in A046655.at n=10A046656
- Numbers n such that n concatenated with n-1 is a square.at n=2A054214
- Number of compositions of n with first part 4 and no equal adjacent parts; this is column 4 of the array in A096568.at n=21A096572
- Number of isotopy classes of Latin squares of order n containing no 2 X 2 Latin subsquare.at n=8A097548
- a(n) = 2*A076218(n).at n=4A098706
- a(n) = (2*n-1)^2 + (2*n+1)^2.at n=35A108100
- Duplicate of A054214.at n=2A116123
- Duplicate of A054214.at n=2A116142
- Number of vertices in all ordered (plane) trees with n edges that are at distance two from all the leaves above them.at n=10A121320
- Numbers of the form (square + 1) that are not squarefree.at n=11A124809
- Triangle read by rows: T(n,k) is the number of skew Dyck paths of semilength n and having height of the first peak equal to k (1 <= k <= n).at n=50A128744
- Numbers such that the two adjacent integers are a perfect square and a prime.at n=37A163492
- Number of binary strings of length n with equal numbers of 00000 and 00101 substrings.at n=14A164182
- a(n) = 25*2^(n+3) - (198+392*n/3+36*n^2+10*n^3/3).at n=6A169833
- Sum of the numbers already removed (including the target number) in the first jump of a Sieve of Eratosthenes table.at n=23A179654
- Number of n X n symmetric (0,1)-matrices containing four ones.at n=12A185355
- a(n) = n*(14*n + 13).at n=26A195028
- Cancellation factor in reducing Sum_{k=0...n} n^k/k! to lowest terms.at n=28A214402