5707
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
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 6160
- Proper Divisor Sum (Aliquot Sum)
- 453
- 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
- 5256
- Möbius Function
- 1
- Radical
- 5707
- 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
- 28
- 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 for MgZn2, Mg position.at n=19A009939
- Numbers k such that the continued fraction for sqrt(k) has period 60.at n=22A020399
- Numbers that are the sum of 4 distinct positive cubes in exactly 3 ways.at n=31A025410
- Numbers that are the sum of 4 distinct positive cubes in 3 or more ways.at n=35A025413
- a(n) = Sum_{k=m..n} T(k,n-k), where m = floor((n+1)/2); a(n) is the n-th diagonal-sum of left justified array T given by A027935.at n=22A027947
- Numbers whose set of base-8 digits is {1,3}.at n=39A032915
- Numbers each of whose runs of digits in base 12 has length 2.at n=39A033010
- Numbers ending with '7' that are the difference of two positive cubes.at n=31A038862
- Semiprimes p1*p2 such that p2 mod p1 = 10, with p2 > p1.at n=30A064908
- a(0)=0, a(1)=1, a(2)=1, a(3)=1, a(n) = a(n-3) + a(n-4) for n > 3.at n=46A079398
- Antidiagonal sums of square array A082011.at n=12A082014
- Bisection of A088567.at n=48A088575
- 75-gonal numbers: a(n) = n*(73*n-71)/2.at n=13A098230
- Numbers n such that n and its digit reversal both are difference of (positive or negative) cubes.at n=50A104339
- Expansion of (1+t^3)^2/((1-t)*(1-t^2)^2*(1-t^4)).at n=50A106607
- Maximum number of regions defined by n zigzag-lines in the plane when a zigzag-line is defined as consisting of two parallel infinite half-lines joined by a straight line segment.at n=36A117625
- Least K such that K*p(n)#-1 is the first of twin primes and 2*(K*p(n)#-1)+1 is prime, so K*p(n)#-1 is the first of twin primes and a Sophie Germain prime.at n=27A117848
- Floor(Zeta(3)^n).at n=46A125890
- a(n) = 3*a(n-1)-3*a(n-2)+a(n-3)+a(n-4).at n=14A138653
- a(n) is the smallest number m from A173977 for which A020639(2m-1) = prime(n).at n=24A173979