8939
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
- 4
- Divisor Sum
- 10224
- Proper Divisor Sum (Aliquot Sum)
- 1285
- 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
- 7656
- Möbius Function
- 1
- Radical
- 8939
- 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
- 122
- 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
- Expansion of 1/(1-x^3-x^4-x^5-x^6-x^7-x^8-x^9).at n=29A017822
- Denominators of continued fraction convergents to sqrt(250).at n=8A041469
- Denominators of continued fraction convergents to sqrt(1000).at n=10A042937
- Numbers whose base-4 representation contains exactly four 2's and two 3's.at n=33A045155
- Number of ways to cover (without overlapping) a ring lattice (necklace) of n sites with molecules that are 7 sites wide.at n=39A058366
- Prefixing, suffixing or inserting a 9 in the number anywhere gives a prime.at n=36A069833
- Square array, read by antidiagonal: T(n,k) = n*T(n,k-1)+(-1)^k*T(n,floor(k/2)).at n=57A089141
- Number of essentially different semi-magic squares of order 3 with semimagic sum n.at n=25A122751
- (Average of twin balanced prime pairs)/10.at n=32A173893
- Number of strings of numbers x(i=1..n) in 0..5 with sum i*x(i) equal to n*5.at n=8A184699
- Number of strings of numbers x(i=1..9) in 0..n with sum i*x(i) equal to n*9.at n=4A184709
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 398", based on the 5-celled von Neumann neighborhood.at n=31A271695
- Number of integer partitions of n whose product is a powerful number.at n=39A330106
- Discriminants of imaginary quadratic fields with class number 38 (negated).at n=20A351676