7499
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
- 7500
- 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
- 7498
- Möbius Function
- -1
- Radical
- 7499
- 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
- 88
- 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
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Prime Index
- 950
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Prime(n)*...*a(n) is the least product of consecutive primes which is non-deficient.at n=21A007686
- Prime(n)*...*a(n) is the least product of consecutive primes which is abundant.at n=21A007708
- Number of strictly increasing addition chains of length n.at n=7A008933
- a(0) = 1, a(n) = 17*n^2 + 2 for n>0.at n=21A010007
- Duplicate of A008933.at n=7A010787
- sin(log(cos(x)))=-1/2!*x^2-2/4!*x^4-1/6!*x^6+148/8!*x^8+...at n=5A010788
- Numbers k such that the continued fraction for sqrt(k) has period 82.at n=15A020421
- 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 85.at n=25A031583
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 36 ones.at n=37A031804
- Denominators of continued fraction convergents to sqrt(512).at n=8A041979
- Numbers whose base-3 representation has exactly 9 runs.at n=29A043589
- Numbers n such that number of runs in the base 3 representation of n is congruent to 0 mod 9.at n=29A043806
- Numbers k such that number of runs in the base 3 representation of k is congruent to 9 mod 10.at n=29A043824
- Expansion of (1-2x)/(1-3x-x^3+2x^4).at n=9A052976
- 5-morphic but not bimorphic, automorphic nor trimorphic.at n=38A056036
- Central column of Pascal's "rhombus" (actually a triangle) A059317.at n=9A059345
- Numbers n such that 1n1, 3n3, 7n7 and 9n9 are all primes.at n=16A059677
- Primes p such that 1p1, 3p3, 7p7 and 9p9 are all primes.at n=4A059694
- Primes p such that p^8 reversed is also prime.at n=37A059701
- Distinct (non-overlapping) twin Harshad numbers whose sum is prime.at n=31A060288