4739
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
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 5424
- Proper Divisor Sum (Aliquot Sum)
- 685
- 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
- 4056
- Möbius Function
- 1
- Radical
- 4739
- 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
- 121
- 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
- From a nim-like game.at n=31A003413
- Coordination sequence T3 for Zeolite Code MTT.at n=42A008191
- Coordination sequence T2 for Banalsite.at n=41A008250
- Coordination sequence for alpha-Mn, Position Mn3.at n=18A009952
- Triangle of multi-edge stars with n edges by cyclotomic index.at n=60A010358
- A modified Pierce-type expansion for Pi: Pi = a(0) + Sum_{n>=1} (-1)^floor(n/2)/(Product_{i=1..n} a(i)).at n=3A015884
- Cycle of 2 steps possible for 'concatenate a(n) and nextprime(a(n)) is a prime'.at n=32A034592
- Composite numbers whose prime factors contain no digits other than 6 and 7.at n=6A036322
- Number of partitions satisfying cn(1,5) <= 1 and cn(4,5) <= 1.at n=39A039854
- Numerators of continued fraction convergents to sqrt(815).at n=6A042572
- Numerators of continued fraction convergents to sqrt(835).at n=6A042612
- Numbers whose base-5 representation contains exactly three 2's and two 4's.at n=11A045291
- Composite and every divisor (except 1) contains the digit 7.at n=19A062676
- Semiprimes p1*p2 such that p2 > p1 and p2 mod p1 = 5.at n=40A064903
- {Sum of all k-digit numbers > n }-{sum of all k-digit numbers < n}, n is a 'k'digit number.at n=15A109644
- Numbers that are not the sum of two triangular numbers and a fourth power.at n=30A115160
- Expansion of x^2*(1 + 2*x + 7*x^2 - 3*x^3 + x^4)/(1 - 26*x^3 - x^6).at n=9A121963
- a(n) is the least k such that the remainder when 10^k is divided by k is n.at n=32A127818
- Number of distinct means of nonempty subsets of {1,...,n}.at n=35A135342
- First appearance of n in continued fraction for sqrt(2)+sqrt(3).at n=47A147584