16718
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 23
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 27048
- Proper Divisor Sum (Aliquot Sum)
- 10330
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 7704
- Möbius Function
- -1
- Radical
- 16718
- Omega Function (Ω)
- 3
- Little Omega Function (ω)
- 3
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
- 141
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- yes
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- yes
- Odd
- no
Appears in sequences
- A generalized difference set on the set of all integers (lambda = 1).at n=22A024431
- Numbers which form a prime by appending a 3-digit odd number and form no primes by appending any 1- or 2-digit odd number not beginning with 0.at n=1A091089
- Primefree centuries (i.e., numbers k such that no prime exists between 100*k and 100*k+99).at n=0A181098
- 1/4 the number of (n+1) X 8 binary arrays with all 2 X 2 subblock sums the same.at n=14A183984
- Least k such that the interval 100k to 100k+99 has exactly n primes.at n=0A186311
- Numbers k such that 3^k + 14 is prime.at n=24A219035
- Number of partitions p of n such that floor(mean(p)) or ceiling(mean(p)) is a part.at n=37A241344
- 7-Modular Catalan Numbers C_{n,7}.at n=10A261590
- Number of partitions of n having no odd singletons (n>=0).at n=44A265256
- Numbers k such that k * 15^k - 1 is prime.at n=4A299378
- Numbers k such that 375*2^k+1 is prime.at n=48A323028
- Numbers which form a prime by appending a 3-digit number and form no primes by appending 1 digit or 2 digits.at n=0A365813