5986
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 28
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 9324
- Proper Divisor Sum (Aliquot Sum)
- 3338
- 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
- 2880
- Möbius Function
- -1
- Radical
- 5986
- Omega Function (Ω)
- 3
- Little Omega Function (ω)
- 3
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
- 49
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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
- yes
- Odd
- no
Appears in sequences
- A generalized partition function.at n=16A002599
- Number of strict 3rd-order maximal independent sets in cycle graph.at n=40A007392
- Coordination sequence for CaF2(1), F position.at n=26A009924
- Triangle of q-binomial coefficients for q=-9.at n=12A015121
- Gaussian binomial coefficient [ n,2 ] for q = -9.at n=2A015260
- Powers of sqrt(12) rounded to nearest integer.at n=7A017941
- Powers of sqrt(12) rounded up.at n=7A017942
- Powers of fourth root of 12 rounded to nearest integer.at n=14A018079
- Powers of fourth root of 12 rounded up.at n=14A018080
- a(n) = least m such that if r and s in {1/2, 1/5, 1/8, ..., 1/(3n-1)} satisfy r < s, then r < k/m < (k+1)/m < s for some integer k.at n=34A024837
- Exactly half of first a(n) terms of A022300 are 1's (not known to be infinite).at n=1A025513
- Character of extremal vertex operator algebra of rank 41/2.at n=3A028546
- Nearest integer to n^(7/2).at n=12A036489
- Starting from generation 5 add previous and next term yielding generation 6.at n=42A048452
- First spoke of a hexagonal spiral.at n=45A056105
- Numbers n such that digits of n and the prime factorization of n are distinct and nonrepeating.at n=27A057885
- a(n) = a(n-1)+ceiling(a(n-2)/2) with a(0)=0, a(1)=1.at n=28A064323
- Numbers k such that A000984(k) mod k = 0 and A080383(k) != 7.at n=19A080392
- Number of partitions of 2n in which all odd parts occur with multiplicity 2. There is no restriction on the even parts.at n=23A101277
- Least k such that k*((prime(n)#)^2)-1 and k*((prime(n)#)^2)+1 are twin primes.at n=48A103557