3085
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 3708
- Proper Divisor Sum (Aliquot Sum)
- 623
- 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
- 2464
- Möbius Function
- 1
- Radical
- 3085
- 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
- 35
- 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
- Numbers that are the sum of 10 positive 7th powers.at n=18A003377
- Coordination sequence for FeS2-Marcasite, S position.at n=29A009954
- a(n) = floor(n*(n-1)*(n-2)/24).at n=43A011842
- Numbers k such that the continued fraction for sqrt(k) has period 45.at n=7A020384
- Sequence A025513 divided by 2.at n=39A025514
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 22 ones.at n=40A031790
- Conjecturally, a power of 2 written in base 3 cannot have this many 2's.at n=23A036463
- Coordination sequence T1 for Zeolite Code STF.at n=37A038443
- Denominators of continued fraction convergents to sqrt(113).at n=11A041205
- Numbers n such that string 8,5 occurs in the base 10 representation of n but not of n-1.at n=33A044417
- Numbers n such that string 8,5 occurs in the base 10 representation of n but not of n+1.at n=33A044798
- Numbers whose base-4 representation contains exactly three 0's and two 3's.at n=26A045078
- Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 13.at n=8A051978
- McKay-Thompson series of class 51A for the Monster group.at n=50A058704
- Number of primes below n^3 does not exceed n times the number of primes below n^2.at n=37A060304
- Numbers k such that the Lucas Aurifeuillian primitive part B of Lucas(k) is prime.at n=37A061443
- Binary representation of base-(i-1) expansion of n: replace i-1 with 2 in base-(i-1) expansion of n.at n=35A066321
- Partial sums of sequence of odd primes (A065091); a(n) = sum of the first n odd primes.at n=38A071148
- Indices of double-safe primes: p=prime(n) is double-safe: q=(p-1)/2 & r=(q-1)/2 are both prime (and q is safe).at n=35A075133
- Indices of triple-safe primes: p=prime(n) is double-safe: q=(p-1)/2, r=(q-1)/2 and s=(r-1)/2 are all prime (and q is double-safe).at n=9A075134