16091
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 16092
- 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
- 16090
- Möbius Function
- -1
- Radical
- 16091
- 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
- 97
- 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
- 1873
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Strobogrammatic numbers: the same upside down.at n=45A000787
- Primes p such that the multiplicative order of 2 modulo p is (p-1)/5.at n=38A001135
- Strobogrammatic primes.at n=4A007597
- Number of 5-tuples of different integers from [ 2,n ] with no common factors among quadruples.at n=20A015645
- Strobogrammatic primes: the same upside down (calculator-style numerals).at n=12A018847
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 62 ones.at n=36A031830
- Numbers having four 3's in base 8.at n=30A043436
- Number of fullerenes with 2n vertices (or carbon atoms), counting enantiomorphic pairs as distinct.at n=25A057210
- Denoting 5 consecutive primes by p, q, r, s and t, these are the values of q such that q, r and s have 10 as a primitive root, but p and t do not.at n=35A060261
- Primes that are still primes when turned upsided down.at n=42A080788
- Primes and their indices such that when their respective SOD's are both prime, the SOD of the index is the nextprime of the prime SOD.at n=26A117458
- Strobogrammatic non-palindromic primes.at n=1A133207
- Number of conjugate-congruent partitions of n.at n=42A137438
- Primes congruent to 9 mod 43.at n=39A142258
- Primes congruent to 17 mod 47.at n=40A142368
- Primes congruent to 32 mod 53.at n=35A142562
- Primes congruent to 43 mod 59.at n=36A142770
- Primes congruent to 48 mod 61.at n=29A142846
- Strobogrammatic cyclops numbers.at n=6A153806
- Strobogrammatic cyclops primes.at n=1A153807