3771
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 5460
- Proper Divisor Sum (Aliquot Sum)
- 1689
- 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
- 2508
- Möbius Function
- 0
- Radical
- 1257
- 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
- 113
- 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
- Number of self-dual 2-colored necklaces with 2n beads.at n=17A007147
- Prime(n)*...*prime(a(n)) is the least product of consecutive primes that is non-deficient.at n=40A007684
- Prime(n)*...*prime(a(n)) is the least product of consecutive primes which is abundant.at n=40A007707
- Coordination sequence T2 for Cordierite.at n=37A008252
- a(n+1) = a(n) converted to base 9 from base 6 (written in base 10).at n=10A023386
- Index of 10^n within the sequence of the numbers of the form 2^i*10^j.at n=47A025740
- Numbers whose set of base-12 digits is {2,3}.at n=15A032812
- Number of partitions satisfying (cn(0,5) <= cn(1,5) = cn(4,5)).at n=42A036809
- Numerators of continued fraction convergents to sqrt(99).at n=4A041178
- a(n)=(s(n)+1)/8, where s(n)=n-th base 8 palindrome that starts with 7.at n=41A043071
- Numbers whose base-4 representation contains exactly three 2's and three 3's.at n=11A045151
- Becomes prime after exactly 6 iterations of f(x) = sum of prime factors of x.at n=35A047825
- Number of independent sets of vertices in graph K_5 X C_n (n > 2).at n=5A051930
- Numbers k such that k^2 + k + 1, k^3 + k + 1 and k^4 + k + 1 are all prime.at n=21A057683
- Triangle: Number of asymmetric self-converse semigroups of order n with k idempotents.at n=23A058169
- Transform of A059502 applied to sequence 4,5,6,...at n=7A059507
- Numbers with all odd digits, in which each digit divides the number formed by the rest, i.e., the number obtained by just removing this digit.at n=30A061507
- Numbers n whose sum of divisors and number of divisors are both triangular numbers.at n=15A070996
- Rounded volume of a regular octahedron with edge length n.at n=20A071400
- Gives an LCD representation of n.at n=34A071843