9479
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
- 4
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 9480
- Proper Divisor Sum (Aliquot Sum)
- 1
- 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
- 9478
- Möbius Function
- -1
- Radical
- 9479
- Omega Function (Ω)
- 1
- Little Omega Function (ω)
- 1
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
- 197
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- yes
- Composite Number
- no
- Semiprime
- no
- Squarefree Number
- yes
- Prime Power
- yes
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- yes
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Prime Index
- 1175
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Number of permutations that are 2 "block reversals" away from 12...n.at n=13A007972
- Coordination sequence for MgNi2, Position Mg2.at n=24A009935
- a(0) = 1, a(n) = 13*n^2 + 2 for n>0.at n=27A010004
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 97.at n=8A031595
- Numbers whose base-5 representation contains exactly three 0's and two 4's.at n=25A045216
- Last member of a sexy prime quadruple: value of p+18 such that p, p+6, p+12 and p+18 are all prime.at n=23A046124
- Numbers k > 1 such that, in base 4, k and k^2 contain the same digits in the same proportion.at n=35A061658
- Primes starting and ending with 9.at n=13A062335
- Numbers k such that k, 2*k+1, 3*k+2 are primes.at n=41A067256
- Prime(n) and prime(n+2) use the same digits.at n=15A069794
- a(n) = prime(n*(n+1)/2 + n).at n=46A078723
- Primes that are a concatenation of a prime and its first digit.at n=24A085414
- Numbers n such that A003313(n) = A003313(2n).at n=39A086878
- First occurrence of n in A093723, or -1 if n does not occur.at n=51A093724
- Numbers m such that f(k) * 2^m - 1 is prime, where f(j) = A070826(j) and k is the number of decimal digits of 2^m.at n=35A095991
- Primes from merging of 4 successive digits in decimal expansion of Catalan's constant.at n=16A104918
- Primes from merging of 4 successive digits in decimal expansion of exp(2).at n=28A105000
- Primes with digit sum = 29.at n=21A106766
- Successive maxima of log(n#)/n where n# is the product of the primes less than n.at n=44A108310
- Prime quartet leaders: largest number of a prime quartet.at n=21A119892