11321
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 8
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 11322
- 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
- 11320
- Möbius Function
- -1
- Radical
- 11321
- 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
- 112
- 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
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- yes
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Prime Index
- 1369
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Fibonacci numbers written in base 4.at n=14A004687
- a(n) = (5*n + 1)^2 + 4*n + 1.at n=21A007533
- a(n) = prime(n^2).at n=36A011757
- Numbers k such that the continued fraction for sqrt(k) has period 3.at n=30A013643
- Generalized Fibonacci numbers.at n=5A015456
- Sort then Add, a(1)=29.at n=14A033904
- Prime number spiral (clockwise, Northwest spoke).at n=18A053999
- Primes p whose reciprocal has period (p-1)/10.at n=18A056215
- Primes whose sum of digits is 8.at n=38A062343
- Primes having only {1, 2, 3} as digits.at n=35A062350
- Primes of the form 666*k - 1.at n=5A063472
- Smallest integer >= 0 of the form x^4 - n^3.at n=33A070928
- Factorial expansion of A071156.at n=26A071158
- Smallest d such that real quadratic field with discriminant d has class number n.at n=14A081364
- Class 6- primes (for definition see A005109).at n=30A081425
- Primes arising in A088088.at n=2A088089
- Solution to the non-squashing boxes problem (version 1).at n=33A089054
- Primes arising in A090479.at n=1A090480
- a(n) is the n-th prime = -1 (mod n).at n=36A093871
- Prime(p^2) where p = prime(n).at n=11A096327