3493
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 4000
- Proper Divisor Sum (Aliquot Sum)
- 507
- 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
- 2988
- Möbius Function
- 1
- Radical
- 3493
- 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
- 149
- 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
- Number of paraffins.at n=24A005999
- Normalized number of connected (n+1)-state finite automata with 2 inputs.at n=2A006691
- Coordination sequence T4 for Zeolite Code DDR.at n=37A008074
- Coordination sequence T2 for Zeolite Code RUT.at n=39A009898
- Number of squares on infinite chessboard at <= n knight's moves from a fixed square.at n=16A018836
- Positive integers which apparently never result in a palindrome under repeated applications of the function A056964(x) = x + (x with digits reversed).at n=39A023108
- Number of compositions of n into prime parts.at n=24A023360
- a(n) = (d(n)-r(n))/2, where d = A026037 and r is the periodic sequence with fundamental period (1,0,0,1).at n=25A026038
- a(n) is the smallest number k such that k*2^(2^n) + 1 is prime.at n=15A030239
- Coordination sequence T2 for Zeolite Code STT.at n=39A038423
- Denominators of continued fraction convergents to sqrt(406).at n=7A041771
- Numbers n such that string 9,3 occurs in the base 10 representation of n but not of n-1.at n=37A044425
- Numbers k such that the digit string 9,3 occurs in the base-10 representation of k but not of k+1.at n=37A044806
- a(n) = Sum_{i=0..n} A047130(i, n-i).at n=13A047131
- Numbers n such that prime(n) - sigma(n) - phi(n) = prime(n+1) - sigma(n+1) - phi(n+1), where sigma(n) = sum of divisors of n.at n=31A048783
- Starting positions of strings of 2 1's in the decimal expansion of Pi.at n=32A050208
- Discriminants of real quadratic fields with class number 1 and related continued fraction period length of 22.at n=18A051963
- Limiting number of m X m binary matrices with m+n ones, with no zero rows or columns, up to row and column permutations, as m tends to infinity.at n=5A057152
- Number of non-factorable subsets of size >= 2 of a 1 X n uniform grid.at n=11A057750
- Integers n > 196 such that the 'Reverse and Add!' trajectory of n joins the trajectory of 196.at n=22A063049