17179
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 25
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 17640
- Proper Divisor Sum (Aliquot Sum)
- 461
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 16720
- Möbius Function
- 1
- Radical
- 17179
- 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
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 190
- 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
- no
- Odd
- yes
Appears in sequences
- Initial number for record sum of numbers in trajectory of 3x+1 problem.at n=31A033495
- Numbers whose base-7 representation has exactly 6 runs.at n=19A043621
- Number of primitive (aperiodic) reversible string structures with n beads using exactly four different colors.at n=9A056338
- Union of A080105 and A080106.at n=39A080078
- Round(226*phi^n).at n=22A080106
- Numbers k such that k^4 contains a pandigital substring.at n=35A115934
- Number of ordered rooted trees where each subtree from given node has the same number of nodes.at n=24A127525
- Partial sums of A023200.at n=40A172112
- Numerator of H(n+4) - H(n), where H(n) = Sum_{k=1..n} 1/k.at n=18A189642
- Number of ordered triples (w,x,y) with all terms in {1,...,n} and w^3 >= x^3 + y^3.at n=39A211651
- Triangle read by rows: T(n,k) = number of primitive (aperiodic) reversible string structures with n beads using exactly k different colors.at n=48A276544
- Triangle read by rows: row n consists of the n numbers k such that A075254(k) = A346378(n).at n=52A360637