3489
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 24
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 4656
- Proper Divisor Sum (Aliquot Sum)
- 1167
- 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
- 2324
- Möbius Function
- 1
- Radical
- 3489
- 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
- 87
- 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
- Coordination sequence T1 for Zeolite Code MEI.at n=43A008146
- Numbers k such that the continued fraction for sqrt(k) has period 52.at n=14A020391
- a(n) = T(2n,n+1), T given by A026736.at n=6A026850
- Numbers having period-1 5-digitized sequences.at n=36A031187
- 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 38.at n=26A031536
- "AGK" (ordered, elements, unlabeled) transform of 1,2,3,4...at n=10A032025
- Numbers whose set of base-7 digits is {1,3}.at n=39A032914
- Numbers whose square contains no loops in its digits (assumes 1, 2, 3, 5, 7 have no loops and 0, 4, 6, 8, 9 do).at n=37A034905
- Coordination sequence T4 for Zeolite Code SFF.at n=39A038434
- Numbers n such that string 8,9 occurs in the base 10 representation of n but not of n-1.at n=34A044421
- Numbers n such that string 4,8 occurs in the base 10 representation of n but not of n+1.at n=38A044761
- Numbers k such that string 8,9 occurs in the base 10 representation of k but not of k+1.at n=34A044802
- a(n)=T(n,n+1), array T as in A049735.at n=23A049741
- Numbers n such that 87*2^n-1 is prime.at n=26A050569
- a(n) = A000994(n+2) - A000995(n+2).at n=10A051139
- T(2n,n), array T as in A054134.at n=5A054139
- Positive numbers k such that, in base 3, 2^k and 2^(k+1) have the same number of digits and the same number of 0's.at n=43A056734
- Numbers m such that 2^m reversed is prime.at n=22A057708
- a(n) = (Sum of the first n primes) + n.at n=41A060939
- RATS: Reverse Add Then Sort the digits applied to previous term, starting with 3.at n=9A066710