14779
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 28
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 5
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 14780
- Proper Divisor Sum (Aliquot Sum)
- 1
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 14778
- Möbius Function
- -1
- Radical
- 14779
- 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
- 195
- 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
- 1732
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Smallest prime p such that the product of q/(q-1) over the primes from prime(n) to p is greater than 2.at n=28A001275
- Expansion of 1/((1-2x)*(1-4x)*(1-9x)).at n=4A016291
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 94 ones.at n=6A031862
- Discriminants of imaginary quadratic fields with class number 17 (negated).at n=28A046014
- Primes with multiplicative persistence value 5.at n=32A046505
- Primes whose sum of digits is the perfect number 28.at n=34A048517
- Numbers k such that 60^k - 59^k is prime.at n=2A062626
- Prime(n) and prime(n+2) use the same digits.at n=22A069794
- Sum_{k<=n} (sigma(k)^2), where sigma(k) denotes the sum of the divisors of k A000203.at n=23A072379
- Prime(p)-4 for primes p such that prime(p) - 4 is prime.at n=37A094069
- Smallest prime equal to the sum of exactly 2n+1 distinct odd primes in at least n ways.at n=39A100697
- Prime arithmetic mean of ten consecutive primes.at n=33A123096
- Primes of the form 2*3*5*7*n+79.at n=34A141563
- Primes congruent to 30 mod 43.at n=40A142279
- Primes congruent to 21 mod 47.at n=39A142372
- Primes congruent to 45 mod 53.at n=34A142575
- Primes congruent to 29 mod 59.at n=33A142756
- Primes congruent to 17 mod 61.at n=27A142815
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 0), (-1, -1, 1), (-1, 0, -1), (1, 1, 0)}.at n=10A148524
- Primes of the form 18*p+1, where p is also a prime.at n=40A165811