11929
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 22
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 12160
- Proper Divisor Sum (Aliquot Sum)
- 231
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 11700
- Möbius Function
- 1
- Radical
- 11929
- 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
- 99
- 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 for which 10k+1, 10k+3, 10k+7 and 10k+9 are primes.at n=40A007811
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 70 ones.at n=15A031838
- Sort then Add, a(1)=17.at n=11A033899
- Numbers k > 1 such that k mod ord2(k) is even, where ord2(k) is the order of 2 mod k.at n=19A036260
- Partial sums of A000285.at n=16A053311
- a(n) = 15*n^2 + 6*n + 1.at n=28A080861
- Partial sums of A084519. Positions of ones in the first differences of A084516.at n=8A084518
- a(n) is the number of terms in the expansion of (x+y+z)*(x^2+y^2+z^2)*(x^3+y^3+z^3)*...*(x^n+y^n+z^n).at n=16A086796
- a(n) = Sum_{k=0..n} 3^(k-1)*Fibonacci(k).at n=7A099013
- Matrix logarithm of triangle A107719, read by rows.at n=40A107724
- Odd numbers n for which 13 is the smallest i (>= 1) with Jacobi symbol J(i,n) getting either a value 0 or -1.at n=37A112076
- Products of two primes that are not Chen primes.at n=36A115719
- Indices of the triangular numbers which are also centered triangular number.at n=7A133161
- a(n) = gcd(a(n-1),n-1)*a(n-1) + d(n-1) if a(n-1) is not divisible by 2, otherwise a(n) = a(n-1)/2, where gcd denotes common divisor, d(n) is number of divisors of n.at n=45A133904
- a(n) = 7^n mod 3^n.at n=11A138617
- Number of partitions of n having no parts with multiplicity 10.at n=34A184645
- Numbers k such that (2^k + k - 1)*2^k + 1 is prime.at n=7A201358
- The least nonsquare number s having exactly n twos in the periodic part of the continued fraction of sqrt(s).at n=33A206582
- Number of n X n 0..1 arrays with new values 0..1 introduced in row major order and no element equal to more than two of its immediate leftward or upward or left-upward diagonal neighbors.at n=3A208263
- Number of n X 4 0..1 arrays with new values 0..1 introduced in row major order and no element equal to more than two of its immediate leftward or upward or left-upward diagonal neighbors.at n=3A208265