3389
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 23
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 3390
- 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
- 3388
- Möbius Function
- -1
- Radical
- 3389
- 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
- 35
- 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
- yes
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Prime Index
- 477
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Primes p == 3, 9, 11 (mod 20) such that 2p+1 is also prime.at n=42A000355
- Numerators of coefficients of Green function for cubic lattice.at n=7A003282
- Primes of form 3*k^2 - 3*k + 23.at n=29A007637
- Coordination sequence T2 for Zeolite Code AEI.at n=44A008002
- Coordination sequence T3 for Zeolite Code MTT.at n=36A008191
- Coordination sequence T4 for Zeolite Code CON.at n=41A009871
- a(n) = floor((Pi/2)^n).at n=18A014214
- Next prime after n^3.at n=15A014220
- Numbers k such that the continued fraction for sqrt(k) has period 63.at n=4A020402
- Primes that remain prime through 2 iterations of the function f(x) = 3*x + 2.at n=36A023246
- Primes that remain prime through 2 iterations of function f(x) = 6x + 7.at n=45A023258
- Primes that remain prime through 3 iterations of function f(x) = 3x + 2.at n=6A023277
- Sum of the numbers between the two n's in A026362.at n=30A026365
- Palindromic primes in base 16 (or hexadecimal), but written here in base 10.at n=35A029732
- Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 23.at n=0A031611
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 24 ones.at n=34A031792
- Upper prime of a difference of 16 between consecutive primes.at n=8A031935
- "EFK" (unordered, size, unlabeled) transform of 2,1,1,1,...at n=46A032303
- a(n) = floor(n^3 / Pi).at n=22A032633
- Primes of form x^2+35*y^2.at n=35A033224