3527
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 3528
- Proper Divisor Sum (Aliquot Sum)
- 1
- 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
- 3526
- Möbius Function
- -1
- Radical
- 3527
- 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
- 56
- 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
- 492
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Number of ways to fold a strip of n blank stamps.at n=9A001011
- Smallest prime == 7 (mod 8) where Q(sqrt(-p)) has class number 2n+1.at n=32A002146
- Erroneous version of A001011 ("folding a strip of stamps").at n=9A003054
- a(n) = ceiling(1000*log(n)).at n=33A004242
- Coordination sequence T5 for Zeolite Code MFS.at n=37A008177
- Coordination sequence T2 for Moganite, also for BGB1.at n=38A008259
- Numerator of [x^n] in the Taylor series arccosh(exp(x)-arcsinh(x)).at n=5A013323
- From table of maximal epacts e(p) and corresponding primes p, for x_0=2, x_{m+1} = (x_m)^2-1; sequence gives p.at n=23A014426
- Primes whose digits are primes; primes having only {2, 3, 5, 7} as digits.at n=35A019546
- Initial members of prime triples (p, p+2, p+6).at n=31A022004
- Primes that remain prime through 2 iterations of function f(x) = 9x + 8.at n=46A023267
- Primes that remain prime through 3 iterations of function f(x) = 9x + 8.at n=12A023298
- Convolution of composite numbers and odd numbers.at n=16A023650
- Number of 5's in all partitions of n.at n=30A024789
- Terminating decimals of length n of form p/5^q using at most one of each nonzero digit.at n=26A027905
- 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 59.at n=4A031557
- Primes p such that Ramanujan function tau(p) is divisible by 13.at n=28A038543
- Denominators of continued fraction convergents to sqrt(765).at n=7A042475
- a(n) = ((3*n+1)*2^n - (-1)^n)/9.at n=10A045883
- Primes p such that p+2 and p+12 are primes.at n=44A046135