5969
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 29
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 6144
- Proper Divisor Sum (Aliquot Sum)
- 175
- 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
- 5796
- Möbius Function
- 1
- Radical
- 5969
- 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
- 93
- 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 2*10^k - 1 is prime.at n=21A002957
- Numbers k such that the continued fraction for sqrt(k) has period 52.at n=32A020391
- Fibonacci sequence beginning 1, 25.at n=13A022395
- Concatenation of n-th prime number and n-th lucky number.at n=16A032603
- Number of binary codes (not necessarily linear) of length n with 4 words.at n=13A034199
- Numbers k > 1 such that k mod ord2(k) is even, where ord2(k) is the order of 2 mod k.at n=5A036260
- (s(n)+1)/9, where s(n)=n-th base 9 palindrome that starts with 8.at n=35A043079
- a(n) is the number k, 2^n < k < 2^(n+1), such that k/c(k) is a minimum in the interval, where c(k) is Hofstadter-Conway sequence A004001.at n=11A051284
- Numbers k such that 1 + product of first k composite numbers is prime.at n=20A053982
- Numbers that define integer Heronian triangles [prime(a(n)), prime(a(n)+1), A068965(n)] with area A068966(n).at n=14A068964
- Numbers n such that when the digits of Fibonacci(n) are sorted into decreasing order and zeros are dropped it is a prime.at n=42A082922
- A014486-indices of binary trees whose left and right subtree are identical.at n=20A083938
- Numbers n such that 2*prime(n) - prime(n+1) is a square.at n=36A110975
- Numbers k such that 2*k+1, 3*k+2 and 4*k+3 are primes.at n=31A126955
- a(n) integers with digit sum a(n); a(n+1) is the smallest integer > a(n).at n=30A136317
- Numerators of coefficients in series expansion of 1/(Bernoulli trial entropy).at n=49A145176
- Number of "ON" cells after n-th stage in simple 2-dimensional cellular automaton (see Comments for precise definition).at n=42A160117
- Number of binary strings of length n with no substrings equal to 0001 or 0011.at n=15A164393
- Integer part of the volume of a regular tetrahedron with edge length n.at n=36A171973
- Numbers n such that phi(n) = phi(n+8), with Euler's totient function phi=A000010.at n=47A179202