2319
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 15
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 3096
- Proper Divisor Sum (Aliquot Sum)
- 777
- 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
- 1544
- Möbius Function
- 1
- Radical
- 2319
- 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
- 58
- 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
- Number of partitions of n into nonprime parts.at n=46A002095
- Numbers that are the sum of 9 positive 6th powers.at n=29A003365
- Numbers that are the sum of 6 positive 7th powers.at n=8A003373
- Numbers that are the sum of at most 6 positive 7th powers.at n=38A004868
- Numbers that are the sum of at most 7 positive 7th powers.at n=47A004869
- List of pairs of primes in reverse order, starting at 1.at n=4A007796
- Coordination sequence T2 for Zeolite Code -CLO.at n=42A009851
- Numbers k such that the continued fraction for sqrt(k) has period 30.at n=32A020369
- Numbers k such that Fibonacci(k) == -2 (mod k).at n=36A023163
- Convolution of (1, p(1), p(2), ...) and composite numbers.at n=13A023627
- Convolution of (F(2), F(3), F(4), ...) and A001950.at n=10A023654
- a(n) = [ Sum{(log(j)-log(i))^3} ], 2 <= i < j <= n.at n=44A025207
- a(n) = [ 2nd elementary symmetric function of {sqrt(k+1)} ], k = 1,2,...,n.at n=19A025219
- Size of lexicographic code of length n, Hamming distance 10 and weight 10.at n=31A031502
- 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 15.at n=20A031513
- Composite numbers whose prime factors contain no digits other than 3 and 7.at n=32A036316
- Coordination sequence T2 for Zeolite Code AWO.at n=33A038407
- Coordination sequence T4 for Zeolite Code ESV.at n=32A038411
- Number of partitions satisfying cn(0,5) + cn(1,5) + cn(4,5) <= 1.at n=44A039852
- Numbers congruent to 2,3,6,11 mod 12 missing from A042944 (conjectured to be finite).at n=15A042945