5719
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 22
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 7040
- Proper Divisor Sum (Aliquot Sum)
- 1321
- 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
- 4536
- Möbius Function
- -1
- Radical
- 5719
- Omega Function (Ω)
- 3
- 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
- 80
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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 partitions of n if there are two kinds of 1, two kinds of 2 and two kinds of 3.at n=18A000098
- Number of atoms in a decahedron with n shells.at n=19A004068
- Lucas-Carmichael numbers: squarefree composite numbers k such that p | k => p+1 | k+1.at n=5A006972
- Number of balanced ordered trees with n nodes.at n=17A007059
- Pseudoprimes to base 50.at n=36A020178
- Pseudoprimes to base 87.at n=33A020215
- Number of strong single-component edge-subgraphs in Moebius ladder M_n.at n=3A020870
- Lucky numbers with size of gaps equal to 18 (lower terms).at n=29A031900
- Number of planted planar trees (n+1 nodes) where any 2 subtrees extending from the same node have a different number of nodes.at n=11A032009
- Numbers k such that 165*2^k+1 is prime.at n=45A032459
- Duplicate of A007059.at n=17A038495
- a(n)=T(2n-1,n), array T given by A048212.at n=39A048221
- Zeisel numbers.at n=5A051015
- Number of partitions of n into distinct summands (A000009), plus 1 (apart from the first term).at n=54A052839
- If p | n, then p+1 | n+1 for composite n.at n=30A056729
- Numbers k such that k divides the (right) concatenation of all numbers <= k written in base 20 (most significant digit on right).at n=19A061949
- Composite numbers not divisible by 2, 3 or 5 which contain their largest prime factor as a substring in base 2.at n=40A063137
- Bisection of A007059.at n=8A066351
- Numbers k such that k divides the numerator of B(2k) (the Bernoulli numbers), but gcd(3k, 8^k+1) > 3.at n=11A070192
- Number of compositions of the integer n in which the first part is >= the other parts.at n=16A079500