15703
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 16128
- Proper Divisor Sum (Aliquot Sum)
- 425
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 15280
- Möbius Function
- 1
- Radical
- 15703
- 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
- 84
- 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
- Smallest number k for which k, 2k, ... nk all contain the digit 1.at n=7A039932
- Smallest number k for which k, 2k, ... nk all contain the digit 1.at n=8A039932
- Smallest number k for which k, 2k, ... nk all contain the digit 1.at n=9A039932
- Smallest number k for which k, 2k, ... nk all contain the digit 1.at n=10A039932
- Smallest number k for which k, 2k, ... nk all contain the digit 1.at n=11A039932
- Smallest number k for which k, 2k, ... nk all contain the digit 1.at n=12A039932
- Smallest number k for which k, 2k, ... nk all contain the digit 1.at n=13A039932
- Numbers whose base-4 representation contains exactly four 1's and three 3's.at n=30A045132
- a(n) is the smallest number for which the prime distance A051699 is equal to n.at n=20A077019
- Least positive k such that the distance from k to closest prime = n.at n=20A079582
- Smallest number at distance 2n from nearest prime (variant 2).at n=10A132860
- First string of 43 consecutive composite numbers.at n=19A177949
- Triangle T(n,k) read by rows: T(n,k) = Sum_{j=0..k} (-1)^j *binomial(n+1,j)*(k+2-j)^n, 0 <= k < n.at n=30A180246
- Numbers of undirected cycles in the n-triangular graph.at n=3A234629
- Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 918", based on the 5-celled von Neumann neighborhood.at n=13A284410
- Record values in A039932.at n=4A319542
- Triangle read by rows: T(n,k) is the number of acyclic digraphs on n unlabeled nodes with k arcs, n >=0, k = 0..(n-1)*n/2.at n=51A350447