11927
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 11928
- 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
- 11926
- Möbius Function
- -1
- Radical
- 11927
- 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
- 50
- 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
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Prime Index
- 1429
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Primes p such that concatenation of primes from 2 through p is a prime.at n=7A046284
- Primes p such that x^67 = 2 has no solution mod p.at n=22A059330
- Initial term in sequence of four consecutive primes separated by 3 consecutive differences each <=6 (i.e., when d=2,4 or 6) and forming d-pattern=[6, 6,2]; short d-string notation of pattern = [662].at n=13A078857
- Prime mean of 8 horizontal, vertical and main diagonal sums associated with primes in A094454.at n=11A094455
- Iccanobirt prime indices (12 of 15): Indices of prime numbers in A102122.at n=20A102142
- Smallest prime p such that p == 1 (mod prime(n)) and not p == 1 (mod k) for 2 < k < prime(n).at n=18A116605
- Prime sums of 5 positive 5th powers.at n=32A123034
- Number of distinct means of nonempty subsets of {1,...,n}.at n=48A135342
- Prime numbers k such that k^2 +- (k+1) are primes.at n=33A137460
- Primes congruent to 13 mod 37.at n=41A142122
- Primes congruent to 37 mod 41.at n=34A142234
- Primes congruent to 16 mod 43.at n=34A142265
- Primes congruent to 36 mod 47.at n=32A142387
- Primes congruent to 20 mod 49.at n=29A142431
- Primes congruent to 2 mod 53.at n=32A142532
- Primes congruent to 47 mod 55.at n=35A142634
- Primes congruent to 14 mod 57.at n=38A142674
- Primes congruent to 9 mod 59.at n=23A142736
- Primes congruent to 32 mod 61.at n=18A142830
- Primes congruent to 20 mod 63.at n=40A142900