11019
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 12
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 14696
- Proper Divisor Sum (Aliquot Sum)
- 3677
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 7344
- Möbius Function
- 1
- Radical
- 11019
- 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
- 143
- 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
- a(n) = prime(n) + Fibonacci(n).at n=20A004397
- Number of rooted trees with 2-colored leaves.at n=9A029856
- Number of partitions of n with equal nonzero number of parts congruent to each of 1 and 4 (mod 5).at n=48A035568
- Number of rooted trees of nonempty sets with n points. (Each node is a set of 1 or more points.)at n=10A036249
- Becomes prime after exactly 7 iterations of f(x) = sum of prime factors of x.at n=18A047826
- a(n) = (1/6)*(n^3 + 21*n^2 + 74*n + 18).at n=34A103145
- Numbers beginning with a vowel in French.at n=21A118557
- Product of successive primes minus 2.at n=26A124669
- a(n) = (n^3)/2 + (3*n^2)/2 + 3*n + 3.at n=26A127873
- Exponent of least power of 2 having exactly n consecutive 6's in its decimal representation.at n=7A131540
- Cyclops semiprimes.at n=29A160725
- a(n) = A168174(n)-10^12.at n=14A168248
- Numbers n with property that there is a different number m such that the lunar squares n*n and m*m are the same.at n=8A181319
- Expansion of e.g.f. 1/(1 - arcsin(x)).at n=7A189780
- n * (11*n^2 + 6*n + 1) / 6.at n=18A215646
- Number of cyclotomic cosets of 3 mod 10^n.at n=37A220018
- Expansion of 1/(1 - x - x^5 + x^6 - x^7 - x^11 + x^12).at n=38A225500