17118
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 38160
- Proper Divisor Sum (Aliquot Sum)
- 21042
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 5688
- Möbius Function
- 0
- Radical
- 1902
- Omega Function (Ω)
- 5
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 79
- 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
- Trails of length n on hexagonal lattice.at n=6A006818
- Digitally balanced numbers in base 4: equal numbers of 0's, 1's, ... 3's.at n=31A049355
- 4n^2+1, 2n^2+1, 2n^2-1 are all prime.at n=38A055755
- Numbers k such that (k / sum of digits of k) and (k+1 / sum of digits of k+1) are both semiprime.at n=31A085774
- a(n) = floor(Product_{i=1..n} log(prime(i+1))/log(i+1)).at n=26A089223
- Number of free generators of degree n of symmetric polynomials in 4 noncommuting variables.at n=9A124292
- 3 times 11-gonal (or hendecagonal) numbers: a(n) = 3*n*(9*n-7)/2.at n=36A153783
- Number of steps to compute the n-th prime in PRIMEGAME using Kilminster's Fractran program with only nine fractions.at n=9A183133
- Number of length n binary words that contain 000 and 001 and 010 and 011 and 100 and 101 and 110 and 111 as contiguous subsequences. The 3 letter subsequences are allowed to overlap.at n=6A242167
- INVERT transform of planar partitions.at n=9A257674