2327
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 2520
- Proper Divisor Sum (Aliquot Sum)
- 193
- 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
- 2136
- Möbius Function
- 1
- Radical
- 2327
- 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
- 151
- 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 positive integers <= 2^n of form x^2 + 12 y^2.at n=14A000021
- "Pascal sweep" for k=6: draw a horizontal line through the 1 at C(k,0) in Pascal's triangle; rotate this line and record the sum of the numbers on it (excluding the initial 1).at n=47A009475
- Generalized Catalan numbers A(x)^2 -(1+x)^2*A(x) +x*(2+x+x^2) =0.at n=10A025242
- Numbers k such that in k and k^2 the parity of digits alternates.at n=22A030153
- Concatenation of n and n + 4 or {n,n+4}.at n=22A032609
- Beginning of last prime pattern of length n to appear among positive integers.at n=15A035326
- Beginning of last prime pattern of length n to appear among positive integers.at n=14A035326
- Number of partitions of n into parts not of the form 23k, 23k+7 or 23k-7. Also number of partitions with at most 6 parts of size 1 and differences between parts at distance 10 are greater than 1.at n=26A035995
- Coordination sequence T2 for Zeolite Code ESV.at n=32A038410
- Coordination sequence T5 for Zeolite Code ESV.at n=32A038414
- Numbers k such that string 2,7 occurs in the base 8 representation of k but not of k-1.at n=41A044210
- Numbers k such that the string 6,5 occurs in the base 9 representation of k but not of k-1.at n=31A044310
- Numbers n such that string 2,7 occurs in the base 10 representation of n but not of n-1.at n=26A044359
- Numbers n such that string 4,2 occurs in the base 8 representation of n but not of n+1.at n=40A044602
- Numbers n such that string 6,5 occurs in the base 9 representation of n but not of n+1.at n=31A044691
- Numbers n such that string 2,7 occurs in the base 10 representation of n but not of n+1.at n=26A044740
- a(n)=T(n,3), array T as in A049723.at n=38A049734
- Concatenate prevprime(n) and n.at n=24A049851
- Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 12.at n=36A051977
- Numerators in expansion of exp(2x)/(1-x).at n=8A053484