10931
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 11592
- Proper Divisor Sum (Aliquot Sum)
- 661
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 10272
- Möbius Function
- 1
- Radical
- 10931
- 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
- 161
- 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
- Numbers k such that 33*2^k - 1 is prime.at n=35A002240
- Weighted count of partitions with odd parts.at n=43A005896
- Numerators of continued fraction convergents to sqrt(981).at n=8A042898
- G.f.: A(x) = Product_{n>=1} 1/(1 - A007947(n)*x^n)^(1/n), where A007947(n) is the product of the distinct prime factors of n.at n=24A094947
- Number of set partitions of {1,2,...,n} such that the element 1 is in an odd-sized block.at n=8A224271
- Number of unlabeled, connected graphs on n vertices with at least one subgraph isomorphic to a C_4, where C_4 is the cycle graph on four vertices.at n=7A243243
- Expansion of Product_{k>=1} (1+x^k)^k / (1-x^k).at n=14A262667
- Discriminants of imaginary quadratic fields with class number 34 (negated).at n=42A351672
- Numerators of the partial alternating sums of the reciprocals of the Dedekind psi function (A001615).at n=29A357820