16883
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
- 3
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 16884
- 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
- 16882
- Möbius Function
- -1
- Radical
- 16883
- 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
- 58
- 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
- 1947
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Incorrect duplicate of A297408.at n=10A007355
- Revert transform of 2*x*(1-x-x^3+x^4+x^6)-x/(1+x).at n=8A049184
- a(n) = a(1) + a(2) + ... + a(n-1) + a(m) for n >= 4, where m = 2*n - 2 - 2^(p+1) and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = a(2) = a(3) = 1.at n=14A049935
- Sophie Germain primes for which the reversal is also a Sophie Germain prime.at n=24A118573
- Prime sums of 6 positive 5th powers.at n=28A123035
- Numbers n such that n!!+2^n is prime.at n=24A124248
- Primes of the form a^2 + b^2 + c^2 such that a^4 + b^4 + c^4 is prime as well and larger than the first one.at n=33A126118
- Primes congruent to 29 mod 53.at n=38A142559
- Primes congruent to 9 mod 59.at n=36A142736
- Primes congruent to 47 mod 61.at n=32A142845
- Primes which are the sum of 6 consecutive triangular numbers A000217.at n=9A159071
- Primes p such that 2*p^3 -+ 3 are also prime.at n=19A174363
- Primes of the form 5n^3+8.at n=3A201177
- Primes of the form n^2 - 17.at n=38A201314
- Numbers n such that n!*3^n + 1 is prime.at n=17A236169
- Second prime p such that (p+n)^2+n is prime but (p+j)^2+j is not prime for all 0<j<n.at n=33A238674
- Primes congruent to 11 mod 111.at n=29A252893
- Primes p for which exactly four bases b with 1 < b < p exist such that p is a base b Wieferich prime.at n=31A255207
- Number of length n+4 0..1 arrays with at most one downstep in every n consecutive neighbor pairs.at n=41A255995
- Prime numbers that are the sum of one or more consecutive triangular numbers.at n=35A269414