5378
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 23
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 8070
- Proper Divisor Sum (Aliquot Sum)
- 2692
- 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
- 2688
- Möbius Function
- 1
- Radical
- 5378
- 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
- 72
- 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
- yes
- Odd
- no
Appears in sequences
- Coordination sequence T1 for Zeolite Code MTN.at n=44A008186
- a(0) = 1, a(n) = 21*n^2 + 2 for n>0.at n=16A010011
- Numbers whose least quadratic nonresidue (A020649) is 13.at n=14A025025
- s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n-k+1), where k = [ n/2 ], s = A001950 (upper Wythoff sequence).at n=19A025122
- 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 72.at n=15A031570
- Numbers whose base-5 representation contains exactly two 0's and three 3's.at n=13A045198
- Numbers n such that 87*2^n-1 is prime.at n=29A050569
- Number of homeomorphically irreducible general graphs on 3 labeled node and with n edges.at n=12A060578
- Numbers n such that [A070080(n), A070081(n), A070082(n)] is an integer triangle with integer area, having relatively prime side lengths.at n=38A070143
- Numbers n such that [A070080(n), A070081(n), A070082(n)] is an acute integer triangle with integer area.at n=15A070146
- First differences of A087235.at n=5A087240
- a(n) = (1/24) * (A018188(n)-11).at n=36A092153
- Number of 4k+1 primes (A002144) in range ]2^n,2^(n+1)].at n=16A095007
- Numbers k such that the square of k is the concatenation of two numbers m and m-8.at n=1A115446
- Inverse permutation to sequence A083872.at n=33A119628
- a(n) = 3*n^2 - 4*n + 3.at n=42A141631
- a(n) = 9*n^2 - 10*n + 3.at n=25A154262
- Coefficients of the expansion of:p(x,t)=(1 - x)/((1 - x*Exp[t*(1 - x)])*(1 - x*Exp[t*(1 + x)])).at n=27A168347
- Numbers k that divide the sum of digits of 13^k.at n=19A175525
- First terms "a" of quadruples a>b>c>d>0 with six square pairwise sums.at n=5A175534