3591
domain: N
Properties
Digital Properties
- Digit Count
- 4
- 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
- 6400
- Proper Divisor Sum (Aliquot Sum)
- 2809
- 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
- 1944
- Möbius Function
- 0
- Radical
- 399
- 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
- no
- Narcissistic Number
- no
- Collatz Steps
- 149
- 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
- no
- Odd
- yes
Appears in sequences
- a(n) = (8*n+1)*(8*n+7).at n=7A001533
- Divisors of 2^18 - 1.at n=22A003528
- Mian-Chowla sequence (a B_2 sequence): a(1) = 1; for n>1, a(n) = smallest number > a(n-1) such that the pairwise sums of elements are all distinct.at n=43A005282
- a(n) = n*(5*n - 1)/2.at n=38A005476
- Coordination sequence T1 for Zeolite Code MTN.at n=36A008186
- Numbers k that divide s(k), where s(1)=1, s(j)=7*s(j-1)+j.at n=30A014854
- Numbers k such that k divides 4^k - 1.at n=28A014945
- Odd numbers k that divide 25^k - 1.at n=36A014962
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite BEA = Beta Na7[Al7Si57O128] starting with a T3 atom.at n=11A019069
- Numbers k such that Fibonacci(k) == 34 (mod k).at n=29A023180
- Sum of n-th Lucas number greater than 3 and n-th number that is 1 or is not a Fibonacci number.at n=14A023489
- a(n) = b(n) + d(n), where b(n) = (n-th Lucas number > 3) and d(n) = (n-th number that is 1 or is not a Lucas number).at n=14A023497
- a(n) = b(n) + d(n), where b(n) = (n-th Lucas number > 1) and d(n) = (n-th number that is 1, 2, or 3, or is not a Lucas number).at n=15A023501
- a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = A023532, t = (primes).at n=52A024377
- Position of 2^n among the powers of primes (A000961).at n=15A024622
- Positions of cubes among the powers of primes (A000961).at n=18A024627
- s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = A023532, t = (primes).at n=51A025077
- Number of partitions of n into parts not of form 4k+2, 12k, 12k+5 or 12k-5.at n=49A036019
- Base-8 palindromes that start with 7.at n=10A043027
- Numbers n such that string 9,1 occurs in the base 10 representation of n but not of n-1.at n=38A044423