16069
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 22
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 16070
- 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
- 16068
- Möbius Function
- -1
- Radical
- 16069
- 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
- 27
- 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
- yes
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Prime Index
- 1870
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Primes that remain prime through 3 iterations of function f(x) = 9x + 8.at n=37A023298
- Numbers k such that 83*2^k+1 is prime.at n=13A032391
- Value of D for incrementally largest values of minimal x satisfying Pell equation x^2-Dy^2=1.at n=36A033316
- Triangle read by rows: T(n,k) = numerator of P(n, k) = 1 - n!/(n^k*(n-k)!).at n=26A089204
- Last term of prime quadruples.at n=15A090258
- Prime(p)-4 for primes p such that prime(p) - 4 is prime.at n=40A094069
- Prime numbers which when written in base 7 have a composite digit-sum.at n=27A096790
- Least p=prime(k) for which A118123(k)=n.at n=30A117877
- Centered triangular numbers that are prime.at n=23A125602
- Primes congruent to 42 mod 47.at n=36A142393
- Primes congruent to 10 mod 53.at n=32A142540
- Primes congruent to 21 mod 59.at n=32A142748
- Primes congruent to 26 mod 61.at n=28A142824
- Prime factors in a divisibility sequence of the Lucas sequence v(P=3,Q=5) of the second kind.at n=12A164816
- The least number s having exactly n threes in the continued fraction of sqrt(s).at n=32A206583
- Least prime of the form x^2+13*n^2.at n=34A248409
- Prime numbers that are the sum of one or more consecutive triangular numbers.at n=33A269414
- Table read by rows: list of prime 5-tuples of the form (p, p+2, p+6, p+8, p+12).at n=23A270998
- Table read by rows: list of prime 5-tuples of the form (p, p+4, p+6, p+10, p+12).at n=34A270999
- Table read by rows: list of prime sextuplets (p, p+4, p+6, p+10, p+12, p+16).at n=16A271000