17423
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 21120
- Proper Divisor Sum (Aliquot Sum)
- 3697
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 14040
- Möbius Function
- -1
- Radical
- 17423
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 110
- 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
- Denominators of continued fraction convergents to cube root of 7.at n=9A005485
- Non-palindromic number and its reversal are both multiples of 19.at n=35A062916
- Number of 1's in binary expansion of parts in all partitions of n.at n=24A066624
- Squarefree numbers k with largest prime factor = floor(sqrt(k)).at n=22A071311
- Numbers k that have no zero digits and such that both k+1 and (product of digits of k) + 1 are squares.at n=16A081990
- a(n) = 36n^2 - 1.at n=21A136017
- a(n) = 16n^2 + 32n + 15.at n=32A141759
- a(n) = 484*n - 1.at n=35A158330
- The odd composites c such that c=q*g*j*y/2 and q+g=j*y where q,g,j,y are distinct primes.at n=32A167629
- a(n) = (8*n+3)*(8*n+5).at n=16A177065
- a(n) = A220371(n)/(4*A220371(n-1)).at n=32A193365
- Fibonacci sequence beginning 14, 9.at n=16A206641
- n * (11*n^2 + 6*n + 1) / 6.at n=21A215646
- One half of numbers representable in at least two different ways as sums of four nonvanishing cubes. See A259060 for these numbers and their representations.at n=10A261241
- Least common multiple of 3*n+1 and 3*n-1.at n=44A282284
- Write n as a sum of distinct powers of 2, then take the primes of those powers of 2 and multiply them together.at n=44A325094
- Numbers of the form 16n^2 + 32n + 15 for which the central region of its symmetric representation of sigma consists of two subparts of sizes 4n+7 and 4n+1, n>=0.at n=26A335574
- Long leg of the only primitive Pythagorean triple whose inradius is the n-th odd prime and whose short leg is an even number.at n=30A367335