4719
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 21
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 7448
- Proper Divisor Sum (Aliquot Sum)
- 2729
- 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
- 2640
- Möbius Function
- 0
- Radical
- 429
- Omega Function (Ω)
- 4
- 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
- 103
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- 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
- Partial sums of A001037, omitting A001037(1).at n=14A001036
- a(n) = C(n)*C(n+2) - C(n+1)^2 where C() are the Catalan numbers A000108.at n=6A005700
- Number of 3-tuples (p_1, p_2, p_3) of Dyck paths of semilength n, such that each p_i is never below p_{i-1}.at n=5A006149
- a(n) = (1/2)*(binomial(2n, n) - binomial(2n-2, n-1)).at n=6A024482
- a(n) = number of (s(0), s(1), ..., s(n)) such that s(i) is a nonnegative integer and |s(i) - s(i-1)| = 1 for i = 1,2,...,n and s(0) = 2. Also a(n) = sum of numbers in row n+1 of array T defined in A026009.at n=13A026010
- Cube of the lower triangular normalized Eulerian number matrix.at n=7A027538
- Third diagonal of A027538.at n=1A027543
- Second column of A027538.at n=2A027550
- Odd numbers in the (2,3)-Pascal triangle A029600.at n=52A029604
- Odd numbers in the (2,3)-Pascal triangle A029600 that are different from 3.at n=39A029606
- Distinct odd numbers in (2,3)-Pascal triangle A029600.at n=34A029608
- Numbers to the left of the central numbers of the (2,3)-Pascal triangle A029600.at n=54A029610
- Numbers to the left of the central elements of the (2,3)-Pascal triangle A029600 that are different from 2.at n=40A029611
- Odd numbers to the left of the central elements of the (2,3)-Pascal triangle A029600.at n=23A029612
- Odd numbers in (3,2)-Pascal triangle A029618.at n=55A029622
- Odd numbers in (3,2)-Pascal triangle A029618 that are different from 3.at n=41A029624
- Distinct odd numbers in (3,2)-Pascal triangle A029618.at n=37A029626
- Numbers to right of central elements of the (3,2)-Pascal triangle A029618.at n=50A029632
- Numbers to right of central elements of the (3,2)-Pascal triangle A029618 that are different from 2.at n=37A029633
- Odd numbers to right of central elements of the (3,2)-Pascal triangle A029618.at n=22A029634