7895
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
- 9480
- Proper Divisor Sum (Aliquot Sum)
- 1585
- 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
- 6312
- Möbius Function
- 1
- Radical
- 7895
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 189
- 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
- Number of loopless multigraphs with 6 nodes and n edges.at n=11A014396
- Number of B-trees of order 3 with n leaves.at n=26A014535
- a(n) = 1*t(n) + 2*t(n-1) + ... + k*t(n+1-k), where k=floor((n+1)/2) and t is A000201 (lower Wythoff sequence).at n=37A023866
- a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (natural numbers), t = A000201 (lower Wythoff sequence).at n=36A024863
- a(n) = dot_product(1,2,...,n)*(5,6,...,n,1,2,3,4).at n=25A026043
- Numbers k such that 87*2^k+1 is prime.at n=24A032393
- Denominators of continued fraction convergents to sqrt(106).at n=9A041191
- Denominators of continued fraction convergents to sqrt(424).at n=11A041807
- Transpose of A112060.at n=57A112061
- Positive integers i for which A112049(i) == 9.at n=2A112069
- Numbers k such that 2*k+1, 3*k+2 and 4*k+3 are primes.at n=35A126955
- Number of 2 X n arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 2 X n array.at n=43A219853
- In the binary race of Pi, where the race leader changes.at n=49A278920
- Number of separable partitions of n in which the number of distinct (repeatable) parts is > 3.at n=33A325718
- Lexicographically earliest sequence of distinct positive numbers such that if we add ten successive digits the result is divisible by 10.at n=38A327735
- Numbers k such that k + A055012(k) is a square.at n=50A329386
- a(n) is the index of the Stieltjes constant at the beginning of the first set of exactly n successive constants of the same sign.at n=13A354878