1927
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 2016
- Proper Divisor Sum (Aliquot Sum)
- 89
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 1840
- Möbius Function
- 1
- Radical
- 1927
- Omega Function (Ω)
- 2
- Little Omega Function (ω)
- 2
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
- 50
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- 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
- no
- Odd
- yes
Appears in sequences
- a(n) = (8*n+1)*(8*n+7).at n=5A001533
- Class numbers associated with terms of A001988.at n=17A001989
- a(n) = ceiling(n*phi^8), where phi is the golden ratio, A001622.at n=41A004963
- Odd numbers not of form p + 2^k (de Polignac numbers).at n=43A006285
- 7th-order maximal independent sets in cycle graph.at n=49A007389
- If a, b are in the sequence, so is ab+3.at n=45A009302
- [ n(n-1)(n-2)(n-3)/17 ].at n=15A011927
- a(n) = prevprime(n)*nextprime(n).at n=40A013638
- Nearest integer to Gamma(n + 2/9)/Gamma(2/9).at n=8A020023
- a(n) = floor( Gamma(n+2/9) / Gamma(2/9) ).at n=8A020068
- Numbers k such that the continued fraction for sqrt(k) has period 32.at n=26A020371
- Numbers k such that Fib(k) == 13 (mod k).at n=17A023178
- Discriminants of quartic fields with 2 complex conjugates (negated).at n=43A023681
- a(n) = 2^n - n^2.at n=11A024012
- a(n) = T(4n,n), where T is the array defined in A026082.at n=4A026091
- a(n) = n*(n + 6).at n=41A028560
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 43.at n=7A031541
- Concatenation of n and n + 8 or {n,n+8}.at n=18A032613
- Base-4 digits are, in order, the first n terms of the periodic sequence with initial period 1,3,2,0.at n=5A037709
- Numerators of continued fraction convergents to sqrt(966).at n=3A042868