13894
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 25
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 20844
- Proper Divisor Sum (Aliquot Sum)
- 6950
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 6946
- Möbius Function
- 1
- Radical
- 13894
- 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
- 107
- 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
- yes
- Odd
- no
Appears in sequences
- Numbers that are the sum of 9 nonzero 8th powers.at n=22A003387
- Parker's partition triangle T(n,k) read by rows (n >= 1 and 0 <= k <= n-1).at n=61A047812
- Number of maximal sets of partitions of n with property that all parts in all partitions in the set are distinct.at n=26A068598
- Frobenius number of the numerical semigroup generated by three consecutive pyramidal numbers.at n=7A069762
- Numbers k such that numerator(Bernoulli(2*k)/(2*k)) is different from numerator(Bernoulli(2*k)/(2*k*(2*k-1))).at n=54A090495
- Transpose T(n,k) of Parker's partition triangle A047812 (n >= 1 and 0 <= k <= n-1).at n=59A136621
- Record indices of the ratio A002375(n) / n (Goldbach conjecture related).at n=44A137820
- Number of (n+1)X4 binary arrays with every 2X2 subblock determinant equal to exactly one or two horizontal and vertical neighbor 2X2 subblock determinants.at n=5A186896
- Number of (n+1)X7 binary arrays with every 2X2 subblock determinant equal to exactly one or two horizontal and vertical neighbor 2X2 subblock determinants.at n=2A186899
- T(n,k)=Number of (n+1)X(k+1) binary arrays with every 2X2 subblock determinant equal to exactly one or two horizontal and vertical neighbor 2X2 subblock determinants.at n=30A186902
- T(n,k)=Number of (n+1)X(k+1) binary arrays with every 2X2 subblock determinant equal to exactly one or two horizontal and vertical neighbor 2X2 subblock determinants.at n=33A186902
- Number of nX3 integer arrays with each element equal to the number of horizontal, diagonal and antidiagonal neighbors less than itself.at n=3A265977
- T(n,k)=Number of nXk integer arrays with each element equal to the number of horizontal, diagonal and antidiagonal neighbors less than itself.at n=18A265981
- Number of 4Xn integer arrays with each element equal to the number of horizontal, diagonal and antidiagonal neighbors less than itself.at n=2A265984
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 494", based on the 5-celled von Neumann neighborhood.at n=33A272548
- Number of integers in n-th generation of tree T(2^(-1/3)) defined in Comments.at n=40A274158
- Record numbers of unordered triples {a, b, c} of distinct positive integers from 1 to n such that a*b = c*n.at n=45A292430
- Euler transform of A065958.at n=10A301978
- Squarefree semiprimes (products of two distinct primes) between sphenic numbers (products of three distinct primes).at n=39A362507