6313
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 6480
- Proper Divisor Sum (Aliquot Sum)
- 167
- 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
- 6148
- Möbius Function
- 1
- Radical
- 6313
- 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
- 155
- 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
- Expansion of tan(tanh(x)*cos(x)).at n=4A009720
- Numbers k such that sigma(k) = sigma(k+6).at n=23A015866
- Numbers k such that the continued fraction for sqrt(k) has period 70.at n=18A020409
- Ordered sequence of distinct terms of the form floor(x^i * floor(x^j)), i,j >= 0, where x = sqrt(3).at n=41A022769
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 32 ones.at n=38A031800
- Number of partitions satisfying (cn(2,5) = cn(3,5) and cn(0,5) <= cn(1,5) and cn(0,5) <= cn(4,5) and cn(2,5) <= cn(1,5) and cn(2,5) <= cn(4,5)).at n=46A036811
- Number of partitions satisfying cn(2,5) + cn(3,5) <= cn(1,5) and cn(2,5) + cn(3,5) <= cn(4,5).at n=39A039877
- Denominators of continued fraction convergents to sqrt(572).at n=6A042097
- Numbers whose base-4 representation contains exactly two 1's and four 2's.at n=33A045099
- Numbers whose base-5 representation contains exactly two 0's and three 2's.at n=19A045183
- a(n) = Sum_{1 <= x, y <= n} lcm(x, y).at n=12A064951
- Rounded total surface area of a regular icosahedron with edge length n.at n=27A071398
- Boustrophedon transform of the continued fraction of the Euler-Mascheroni constant, gamma (A001620).at n=8A080410
- Numbers k such that 11*7^k + 2 is prime.at n=21A083724
- a(n) = 3^(n+1) - 2^(n+1) + n + 1.at n=7A094618
- Iccanobirt numbers (15 of 15): a(n) = R(R(a(n-1)) + R(a(n-2)) + R(a(n-3))), where R is the digit reversal function A004086.at n=16A102125
- Iccanobirt semiprimes (15 of 15): Semiprime numbers in A102125.at n=2A102205
- Semiprimes whose digit reversal is a nontrivial power.at n=20A108849
- Semiprimes (A001358) whose digit reversal is a powerful(1) number (A001694).at n=23A115688
- Semiprimes (A001358) whose digit reversal is a square.at n=17A115710