1795
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 22
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 2160
- Proper Divisor Sum (Aliquot Sum)
- 365
- 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
- 1432
- Möbius Function
- 1
- Radical
- 1795
- 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
- 68
- Smith Number
- yes
- 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
- a(n) = 7^n - 3*4^n + 2*3^n.at n=3A002501
- Number of connected relations.at n=2A002502
- Sum of 10 nonzero 8th powers.at n=7A003388
- Year of birth of n-th President of U.S.A.at n=10A008745
- f-vectors for simplicial complexes of dimension at most 1 (graphs) on at most n-1 vertices.at n=22A011826
- a(n) = floor( n*(n-1)*(n-2)/20 ).at n=34A011902
- Expansion of 1/((1-x)(1-4x)(1-10x)).at n=3A016225
- Expansion of 1/(1-x^3-x^4-x^5-x^6-x^7-x^8-x^9-x^10-x^11-x^12-x^13).at n=24A017826
- Numbers k such that the continued fraction for sqrt(k) has period 24.at n=23A020363
- a(n) = a(n-1) + a(n-2) + 1, with a(0)=3, a(1)=9.at n=12A022408
- Numbers k such that Fibonacci(k) == 5 (mod k).at n=52A023176
- a(n) = [ 2nd elementary symmetric function of {log(k)} ], k = 2,3,...,n.at n=23A025202
- Index of 10^n within the sequence of the numbers of the form 6^i*10^j.at n=52A025744
- Sequence satisfies T^2(a)=a, where T is defined below.at n=38A027594
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 16.at n=40A031514
- "CFK" (necklace, size, unlabeled) transform of 1,2,3,4...at n=13A032141
- Position of first occurrence of n in continued fraction for Copeland-Erdős constant.at n=27A033309
- a(n+1) = a(n) + sum of squares of digits of a(n).at n=31A033936
- Numbers that eventually reach 1 under "x -> sum of cubes of digits of x".at n=27A035504
- Digit sum of composite odd number equals digit sum of juxtaposition of its prime factors (counted with multiplicity).at n=29A036925