11897
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 26
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 11898
- 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
- 11896
- Möbius Function
- -1
- Radical
- 11897
- 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
- 73
- 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
- 1425
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Numbers k such that the continued fraction for sqrt(k) has period 53.at n=17A020392
- Primes that remain prime through 2 iterations of function f(x) = 8x + 1.at n=29A023260
- Primes that remain prime through 3 iterations of function f(x) = 4x + 3.at n=29A023281
- Primes p such that 8p +1 and (p-1)/8 are primes.at n=8A085958
- Start of seven consecutive primes whose digit reversals are also prime.at n=7A103169
- Triangle read by rows: T(n,k) is the number of Schroeder paths of length 2n having trapezoid weight k.at n=40A104552
- Squares of the norms of Gaussian primes from A107629.at n=27A107630
- Primes for which the weight as defined in A117078 is 11 and the gap as defined in A001223 is 6.at n=23A119597
- Primes of the form p^3 + q^3 + r^3, where p, q and r are primes.at n=23A123597
- Prime numbers n such that n = p1^3 + p2^3 + p3^3, a sum of cubes of 3 distinct prime numbers.at n=5A137365
- Subsequence of A137365 where it is possible to choose p1, p2, p3 so that p1+p2+p3 = prime.at n=5A137366
- Numbers which are the sum of 3 cubes of distinct odd primes.at n=31A138853
- Primes congruent to 20 mod 37.at n=41A142129
- Primes congruent to 7 mod 41.at n=35A142204
- Primes congruent to 29 mod 43.at n=35A142278
- Primes congruent to 6 mod 47.at n=33A142357
- Primes congruent to 39 mod 49.at n=35A142447
- Primes congruent to 25 mod 53.at n=28A142555
- Primes congruent to 17 mod 55.at n=38A142613
- Primes congruent to 41 mod 57.at n=40A142690