3139
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
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 3256
- Proper Divisor Sum (Aliquot Sum)
- 117
- 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
- 3024
- Möbius Function
- 1
- Radical
- 3139
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 35
- 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
- Number of partitions into non-integral powers.at n=12A000339
- Central trinomial coefficients: largest coefficient of (1 + x + x^2)^n.at n=9A002426
- Number of symmetric, reduced unit interval schemes with n+1 intervals (n>=1).at n=18A005213
- Number of elements in Z[ sqrt(-2) ] whose 'smallest algorithm' is <= n.at n=16A006459
- Number of sum-free subsets of {1, ..., n}.at n=17A007865
- Coordination sequence T1 for Zeolite Code EMT.at n=46A008086
- a(0) = 1, a(n+1) = 3 * a(n) - F(n)*(F(n) + 1), where F(n) = A000045(n) is n-th Fibonacci number.at n=8A011769
- Numerator of sum of -3rd powers of divisors of n.at n=27A017669
- Numbers k such that the continued fraction for sqrt(k) has period 38.at n=31A020377
- Fibonacci sequence beginning 4, 11.at n=13A022131
- a(n) = position of n^3 + (n+1)^3 + (n+2)^3 in A003072.at n=19A024972
- Numbers k such that k^2 has digits in nonincreasing order.at n=31A028821
- 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 55.at n=9A031553
- Concatenation of n and n + 8 or {n,n+8}.at n=30A032613
- Multiplicity of highest weight (or singular) vectors associated with character chi_52 of Monster module.at n=33A034440
- Denominators of continued fraction convergents to sqrt(787).at n=6A042517
- Denominators of continued fraction convergents to sqrt(833).at n=9A042609
- Numbers n such that string 3,9 occurs in the base 10 representation of n but not of n-1.at n=34A044371
- Numbers n such that string 1,3 occurs in the base 10 representation of n but not of n+1.at n=35A044726
- Numbers n such that string 3,9 occurs in the base 10 representation of n but not of n+1.at n=34A044752