17790
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 24
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 42768
- Proper Divisor Sum (Aliquot Sum)
- 24978
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 4736
- Möbius Function
- 1
- Radical
- 17790
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 4
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
- 71
- 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
- yes
- Odd
- no
Appears in sequences
- a(n) = prime(n) + Fibonacci(n).at n=21A004397
- Aliquot sequence starting at 966.at n=10A014363
- Theta series of 10-dimensional lattice (C6 X SU(4,2)):C2 with minimal norm 4.at n=6A029770
- Numbers k such that 187*2^k+1 is prime.at n=12A032470
- Numbers n such that n * 2^(n/2) - 1 is prime.at n=11A058775
- n * (1+i)^n + i is a Gaussian prime.at n=21A058782
- Partial sums of A046878.at n=13A177737
- Number of unrooted binary leaf-multi-labeled trees with n leaves on the label set [3].at n=8A220827
- Squarefree numbers n such that n^2 + 1 and n^2 - 1 are semiprime.at n=24A268697
- Number of 5-cycles in the n-triangular honeycomb obtuse knight graph.at n=26A290391
- Theta series of 10-dimensional integral lattice O_10.at n=12A306434
- Lexicographically earliest unbounded aliquot-like sequence based on the Dedekind psi function: a(1) = 318, a(n) = t(a(n-1)) where t(k) = A001615(k) - k.at n=14A323328
- Number of integer partitions of n whose maximum multiplicity is one greater than their minimum multiplicity.at n=49A325279
- Gaps between first elements of prime quintuples of the form (p, p+2, p+6, p+12, p+14). The quintuples are abutting: twin/cousin/sexy/twin pairs.at n=20A342502
- Number of 4 element sets of distinct integer sided rectangles that fill an n X n square.at n=32A387171