3149
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 3264
- Proper Divisor Sum (Aliquot Sum)
- 115
- 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
- 3036
- Möbius Function
- 1
- Radical
- 3149
- 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
- 61
- 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 T8 for Zeolite Code PAU.at n=41A008226
- Coordination sequence T4 for Zeolite Code RUT.at n=37A009900
- Numbers k such that the continued fraction for sqrt(k) has period 52.at n=12A020391
- a(n) = Sum_{k=0..n-2} T(n,k) * T(n,k+2), with T given by A008288.at n=4A026935
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 28 ones.at n=20A031796
- Coordination sequence T7 for Zeolite Code SFF.at n=37A038431
- Denominators of continued fraction convergents to sqrt(991).at n=6A042919
- Numbers n such that the string 7,8 occurs in the base 9 representation of n but not of n-1.at n=38A044322
- Numbers n such that string 4,9 occurs in the base 10 representation of n but not of n-1.at n=34A044381
- Numbers n such that string 7,8 occurs in the base 9 representation of n but not of n+1.at n=38A044703
- Numbers n such that string 1,4 occurs in the base 10 representation of n but not of n+1.at n=35A044727
- Numbers n such that string 4,9 occurs in the base 10 representation of n but not of n+1.at n=34A044762
- Numbers whose base-5 representation contains exactly three 0's and one 1.at n=33A045170
- Numbers whose base-5 representation contains exactly three 0's and two 4's.at n=4A045216
- Coordination sequence T1 for Zeolite Code AEN.at n=35A047950
- Numbers n such that 207*2^n-1 is prime.at n=20A050855
- Discriminants of real quadratic fields with class number 1 and related continued fraction period length of 16.at n=23A050965
- a(n) = floor((4/3)^n).at n=28A064628
- Number of Cartesian lattice points in or on the circle x^2 + y^2 = 10^n.at n=3A068785
- Values of floor((4/3)^n) that are composite.at n=17A070761