5446
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
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 9360
- Proper Divisor Sum (Aliquot Sum)
- 3914
- 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
- 2328
- Möbius Function
- -1
- Radical
- 5446
- 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
- 54
- 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
- G.f.: -1 + Product_{k>=1} (1 + prime(k)*x^prime(k)).at n=32A002099
- Coordination sequence T1 for Keatite.at n=41A009844
- Numbers k such that the continued fraction for sqrt(k) has period 74.at n=11A020413
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 42 ones.at n=22A031810
- Number of proper factorizations of the numbers with a record number of proper factorizations.at n=52A033834
- (Number of permutations of {1,2,...,n} for which sums of adjacent numbers are all distinct)/2n.at n=7A040018
- Numerators of continued fraction convergents to sqrt(194).at n=5A041360
- Base-6 palindromes that start with 4.at n=21A043013
- a(n) = Sum_{k=1..n} phi(k)^2.at n=32A057434
- Numbers k that, when expressed in base 4 and then interpreted in base 8, give a multiple of k.at n=37A062923
- Zero, together with positive numbers k such that prime(k) - k is a square.at n=29A064370
- Numbers k such that the simple continued fraction for (1+1/k)^k contains k.at n=46A071527
- Numbers k such that the k-th term of the EKG sequence (A064413(k)) has more than one controlling prime.at n=22A073735
- Interprimes which are of the form s*prime, s=14.at n=11A075289
- G.f.: (1+x)/Product_{m>0} (1 - x^m).at n=27A084376
- Number of partitions of n such that the least part occurs exactly three times.at n=40A097091
- Numbers n such that prime(n) - n is a perfect power.at n=35A107607
- Numbers k such that 5^k + 4 is prime.at n=9A124621
- Fixed points of the permutation A087559.at n=21A131221
- Similar to A072921 but starting with 4.at n=31A152233