3479
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
- 6
- Divisor Sum
- 4104
- Proper Divisor Sum (Aliquot Sum)
- 625
- 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
- 2940
- Möbius Function
- 0
- Radical
- 497
- Omega Function (Ω)
- 3
- 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
- 56
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- 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
- Numbers k such that 4!*(2k-5)!/(k!*(k-1)!) is an integer.at n=30A004784
- 5!(2n-6)!/n!(n-1)! is an integer.at n=35A004785
- Numbers k such that 6!*(2*k-7)!/(k!*(k-1)!) is an integer.at n=5A004786
- Numbers k such that 7!*(2k-8)!/(k!*(k-1)!) is an integer.at n=5A004787
- Number of 4's in all the partitions of n into distinct parts.at n=57A015739
- Number of partitions of n into distinct parts, none being 4.at n=54A015746
- T(2n-1,n-1), T given by A026659.at n=6A026663
- T(n,[ n/2 ]), T given by A026659.at n=13A026665
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 57.at n=23A031555
- Nonprime; becomes prime if any digit is deleted (zeros not allowed in the number).at n=44A034304
- Numbers k > 1 such that k mod ord2(k) is even, where ord2(k) is the order of 2 mod k.at n=3A036260
- Composite numbers whose prime factors contain no digits other than 1 and 7.at n=19A036307
- a(n) = prime(n)*prime(n+1) - prime(n) - prime(n+1).at n=16A037165
- Numbers k such that the string 8,5 occurs in the base 9 representation of k but not of k-1.at n=46A044328
- Numbers n such that string 7,9 occurs in the base 10 representation of n but not of n-1.at n=37A044411
- Numbers n such that string 4,7 occurs in the base 10 representation of n but not of n+1.at n=38A044760
- Numbers n such that string 7,9 occurs in the base 10 representation of n but not of n+1.at n=37A044792
- a(n) = prime(n)^2 - 2.at n=16A049001
- Numbers k such that the base-3 expansions of 2^k and 2^(k+1) have the same number of 1's and the same number of digits.at n=44A056735
- Scaled Chebyshev U-polynomials evaluated at i*sqrt(7)/2. Generalized Fibonacci sequence.at n=4A057090