7099
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 25
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 7360
- Proper Divisor Sum (Aliquot Sum)
- 261
- 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
- 6840
- Möbius Function
- 1
- Radical
- 7099
- 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
- 57
- 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
- a(n) = 2^n - C(n,0) - ... - C(n,4).at n=13A002664
- a(n) = Sum_{k=0..8} binomial(n,k).at n=13A008861
- Pseudoprimes to base 94.at n=45A020222
- Strong pseudoprimes to base 94.at n=7A020320
- Numbers k such that the continued fraction for sqrt(k) has period 76.at n=14A020415
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 27 ones.at n=1A031795
- Multiplicity of highest weight (or singular) vectors associated with character chi_38 of Monster module.at n=35A034426
- Numbers whose base-4 representation contains exactly three 2's and three 3's.at n=25A045151
- a(n) = 4*n^2 - 7*n + 4.at n=42A054567
- Twice partitioned numbers: the number of ways a number can be partitioned into not necessarily different parts and each part is again so partitioned.at n=13A063834
- Numbers k such that prime(k+3)-(k+3)*tau(k+3) = prime(k-3)-(k-3)*tau(k-3) where tau(k) = A000005(k) is the number of divisors of k.at n=19A067355
- Least nontrivial multiple of the n-th prime beginning with 7.at n=49A078291
- Diagonal of triangular spiral in A051682.at n=39A081268
- a(n) = (9^n - 8^n - 7^n - 6^n + 4*5^n)/2.at n=5A081682
- Semiprimes in A054567.at n=17A113692
- Unsigned row sums of triangle A118407.at n=25A118409
- Numbers with composite sum of digits and prime sum of cubes of digits.at n=34A121642
- a(n) = a(n-1)+a(n-2)+a(n-3)+2*a(n-4), a(0)=1, a(1)=3, a(2)=7, a(3)=15.at n=12A139806
- a(n) = 338*n + 1.at n=20A158000
- a(n) = 169n + 1.at n=41A158221