9070
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 16344
- Proper Divisor Sum (Aliquot Sum)
- 7274
- 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
- 3624
- Möbius Function
- -1
- Radical
- 9070
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 91
- 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
- yes
- Odd
- no
Appears in sequences
- Numbers k such that the continued fraction for sqrt(k) has period 62.at n=40A020401
- Decimal part of a(n)^(1/4) starts with a 'nine digits' anagram.at n=4A034279
- Trajectory of 3 under map n->17n+1 if n odd, n->n/2 if n even.at n=19A037106
- Numbers n such that n^1024 + 1 is prime (a generalized Fermat prime).at n=14A057002
- Duplicate of A057002.at n=14A088360
- Numbers k such that numerator of Bernoulli(2*k) is divisible by 37 and 59, the first two irregular primes.at n=37A092231
- Number of levels in the compositions of n with odd summands.at n=17A094188
- Slowest increasing sequence where the absolute difference between the last digit of a(n) and the first digit of a(n+1) equals 9.at n=19A101243
- Number of palindromes (in base 6) below 6^n.at n=8A117865
- Start with 1 and repeatedly reverse the digits and add 62 to get the next term.at n=21A118157
- a(n) = 250*n - 180.at n=37A154360
- a(n) = (2*n^3 + 5*n^2 + 7*n)/2.at n=19A162264
- Number of symmetry classes of 3 X 3 semimagic squares with distinct positive values < n.at n=15A173723
- Sum of median parts of all partitions of n into an odd number of parts.at n=31A211373
- Least k such that k*6^n-1 , k*6^n+1, and 2*k*6^n-1 are prime; that is, twin primes and a Sophie Germain prime.at n=16A212481
- Number of partitions of n in which no parts are multiples of 6.at n=35A219601
- Numbers k such that the period of Fibonacci numbers mod k is 3*(k+10).at n=41A229466
- Triangle read by rows: T(n,k) = t(n-k, k); t(n,m) = f(m)*t(n-1,m) + f(n)*t(n,m-1), where f(x) = 3*x + 5.at n=11A257624
- Triangle read by rows: T(n,k) = t(n-k, k); t(n,m) = f(m)*t(n-1,m) + f(n)*t(n,m-1), where f(x) = 3*x + 5.at n=13A257624