11069
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 11070
- Proper Divisor Sum (Aliquot Sum)
- 1
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 11068
- Möbius Function
- -1
- Radical
- 11069
- Omega Function (Ω)
- 1
- Little Omega Function (ω)
- 1
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
- 99
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- yes
- Composite Number
- no
- Semiprime
- no
- Squarefree Number
- yes
- Prime Power
- yes
- Prime Factorization
- no
- Twin Prime
- yes
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Prime Index
- 1341
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- a(n) = (3^(2*n+1) - 8*n - 3)/16.at n=5A004004
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 54 ones.at n=36A031822
- Coefficients of Jacobi elliptic function c(4,m).at n=1A032427
- Primes that yield a different prime when rotated by 180 degrees.at n=34A048890
- Triangle of coefficients in expansion of elliptic function sn(u) in powers of u and k.at n=16A060628
- Triangle of coefficients in expansion of elliptic function sn(u) in powers of u and k.at n=19A060628
- Numbers n such that [A070080(n), A070081(n), A070082(n)] is an obtuse isosceles integer triangle with prime side lengths.at n=20A070135
- a(1) =2, a(2) = 3, a(n+2) = smallest prime such that a(n+2) - a(n+1) is a multiple of a(n).at n=9A073680
- Primes that are still primes when turned upsided down.at n=38A080788
- Class 6- primes (for definition see A005109).at n=27A081425
- Convolution of 3^n and floor(n/2).at n=10A097137
- Expansion of (1+2*x)/((1+x)*(1-x^2-x^3)).at n=35A098601
- Primes p = prime(k) such that p+2 and prime(k+7)-2 are both prime numbers.at n=41A105414
- Number of permutations of length n which avoid the patterns 2341, 3214, 4132.at n=9A116794
- Absolute value of second differences of A005849.at n=3A128194
- Cyclops primes.at n=19A134809
- Primes of the form 21x^2+65y^2.at n=39A140023
- Primes congruent to 6 mod 37.at n=34A142115
- Primes congruent to 40 mod 41.at n=31A142237
- Primes congruent to 18 mod 43.at n=31A142267