16183
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 16184
- 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
- 16182
- Möbius Function
- -1
- Radical
- 16183
- 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
- 190
- 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
- 1880
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Smallest prime p such that there is a gap of 2n between p and previous prime.at n=20A001632
- Primes that remain prime through 3 iterations of function f(x) = 2x + 5.at n=36A023274
- Primes that remain prime through 4 iterations of function f(x) = 6x + 5.at n=20A023317
- Primes that remain prime through 5 iterations of function f(x) = 6x + 5.at n=4A023345
- Primes at which the difference pattern X424Y (X and Y >= 6) occurs in A001223.at n=20A052166
- Primes followed by a [4,2,4] prime difference pattern of A001223.at n=31A052378
- Primes p such that p + googol is prime.at n=11A108250
- Primes p such that p*q-p-q and p*q+p+q are prime where q=nextprime(p).at n=34A128548
- Prime numbers p such that p +- ((p-1)/3) are primes.at n=16A137703
- Primes congruent to 18 mod 53.at n=38A142548
- Primes congruent to 17 mod 59.at n=32A142744
- Primes congruent to 18 mod 61.at n=31A142816
- Primes of the form 14 n^2-1.at n=9A143832
- Primes at the upper end of the gaps mentioned in A144104.at n=38A144105
- a(n) = 14*n^2 - 1.at n=33A158485
- a(n) = 56*n^2 - 1.at n=16A158658
- Number of compositions of n such that the number of parts is divisible by the smallest part.at n=14A171625
- a(n) is the smallest prime q such that, for the previous prime p and the following prime r, the fraction (r-q)/(q-p) has denominator n in lowest terms.at n=20A179234
- Primes p such that 10p+1 divides 2^p-1.at n=36A188133
- a(n) = 139*n^2 - 2307*n + 3331.at n=21A230307