11887
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 25
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 11888
- 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
- 11886
- Möbius Function
- -1
- Radical
- 11887
- 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
- 55
- 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
- 1424
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 54 ones.at n=39A031822
- Upper prime of a difference of 20 between consecutive primes.at n=24A031939
- Primes of the form k^2+6.at n=12A056909
- Smallest prime larger than square of n-th prime.at n=28A062772
- Primes of the form p^2 + 6 where p is prime.at n=7A079141
- Class 6- primes (for definition see A005109).at n=33A081425
- Primes p such that the sum of the digits of p is not prime, but the sum of the squares of the digits of p is prime.at n=18A091362
- Smallest prime factor of the concatenation of terms of the n-th row of the Stirling's number of the second kind.at n=31A100757
- Let p(n) be the n-th-prime. Sequence gives primes of the form | p(n)*p(n+2) - p(n+1)*p(n+3)| +1.at n=43A117854
- List of primitive prime divisors of the Somos-4 sequence (A006720) in their order of occurrence.at n=32A129741
- Primes congruent to 10 mod 37.at n=39A142119
- Primes congruent to 38 mod 41.at n=35A142235
- Primes congruent to 19 mod 43.at n=39A142268
- Primes congruent to 43 mod 47.at n=33A142394
- Primes congruent to 29 mod 49.at n=35A142438
- Primes congruent to 15 mod 53.at n=25A142545
- Primes congruent to 7 mod 55.at n=37A142606
- Primes congruent to 31 mod 57.at n=38A142684
- Primes congruent to 28 mod 59.at n=22A142755
- Primes congruent to 53 mod 61.at n=21A142851