4393
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
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 4608
- Proper Divisor Sum (Aliquot Sum)
- 215
- 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
- 4180
- Möbius Function
- 1
- Radical
- 4393
- 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
- 139
- 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
- a(n) = ceiling(1000*log_2(n)).at n=20A004267
- Coordination sequence T2 for Zeolite Code BOG.at n=47A008050
- [ n(n-1)(n-2)(n-3)/13 ].at n=17A011923
- Numbers k such that the continued fraction for sqrt(k) has period 84.at n=7A020423
- Fibonacci sequence beginning 3, 17.at n=13A022127
- a(n) = [ (3rd elementary symmetric function of P(n))/(first elementary symmetric function of P(n)) ], where P(n) = {1, p(1), p(2), ..., p(n-1)}, where p(0) = 1.at n=10A024532
- 4th power of the lower triangular normalized partition matrix.at n=7A027518
- Third diagonal of A027518.at n=1A027527
- Second column of A027518.at n=2A027535
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 30 ones.at n=29A031798
- Numbers whose set of base-11 digits is {3,4}.at n=15A032835
- Coordination sequence T16 for Zeolite Code STT.at n=44A038425
- Number of partitions satisfying cn(2,5) + cn(3,5) < cn(0,5) + cn(1,5) + cn(4,5).at n=30A039869
- Numerators of continued fraction convergents to sqrt(793).at n=3A042528
- a(n)=(s(n)+3)/9, where s(n)=n-th base 9 palindrome that starts with 6.at n=22A043077
- Numbers k such that k^12 == 1 (mod 13^3).at n=23A056086
- Semiprimes p1*p2 such that p2>p1 and p2 mod p1 = 7.at n=21A064905
- Numbers n such that prime(n) == n (mod phi(n)).at n=9A066687
- Smallest multiple of the n-th prime beginning with n.at n=42A078209
- Smallest semiprime (A001358) which is at the end of an arithmetic progression of n semiprimes.at n=11A096003