9779
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 32
- Digital Root
- 5
- Palindromic Number
- yes
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 12288
- Proper Divisor Sum (Aliquot Sum)
- 2509
- 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
- 7560
- Möbius Function
- -1
- Radical
- 9779
- Omega Function (Ω)
- 3
- Little Omega Function (ω)
- 3
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
- 47
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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 such that ten iterations of Reverse and Add are needed to reach a palindrome.at n=10A015991
- Pisot sequence T(2,5), a(n) = floor(a(n-1)^2/a(n-2)).at n=10A018914
- a(n) = (d(n)-r(n))/5, where d = A026049 and r is the periodic sequence with fundamental period (4,1,4,0,1).at n=48A026051
- Expansion of 1/((1-4x)(1-8x)(1-9x)(1-10x)).at n=3A028155
- Palindromes that start with 9.at n=19A043044
- Palindromic and divisible by 7.at n=32A045642
- Palindromes with exactly 3 distinct prime factors.at n=40A046393
- Number of 2 X n checkerboards (with at least one red square) in which the set of red squares is edge connected.at n=9A059020
- Sum of digits = 8 times number of digits.at n=37A061425
- Smallest palindromic multiple of n-th prime.at n=30A062888
- Concatenation of n-th prime and its reverse.at n=24A067087
- Largest palindrome using minimum number of digits with a digit sum = n.at n=32A070244
- Partition the nonnegative integers into minimal groups whose sums are palindromes; this sequence gives the sums.at n=20A072482
- Square root of n has the same nonzero digit in each of the first 4 places to the right of the decimal point.at n=3A073585
- Palindromic odd composite numbers that are the products of an odd number of distinct primes.at n=22A075808
- Palindromic odd numbers with exactly 3 prime factors (counted with multiplicity).at n=32A075814
- Palindromic odd composite numbers with an odd number of prime factors (counted with multiplicity).at n=35A075815
- Palindromes divisible by the number formed by their internal digits.at n=52A088287
- Numbers of the concatenated form 9nn9.at n=7A102484
- a(n) has two outer digits 9 and n inner digits 7.at n=2A108904