12799
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
- 3
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 12800
- 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
- 12798
- Möbius Function
- -1
- Radical
- 12799
- 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
- 169
- 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
- 1526
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Numbers k such that the continued fraction for sqrt(k) has period 96.at n=33A020435
- Arrange digits of cubes in ascending order.at n=31A032553
- Numerators of continued fraction convergents to sqrt(79).at n=7A041140
- Numerators of continued fraction convergents to sqrt(316).at n=7A041596
- Numerators of continued fraction convergents to sqrt(711).at n=7A042368
- Numerators of continued fraction convergents to sqrt(723).at n=4A042392
- Primes whose sum of digits is the perfect number 28.at n=29A048517
- Least k such that the longest palindromic substring (without leading zeros) contained in 2^k has length n.at n=13A052059
- Sum of partial sums of partition numbers (A026905) and partial sums of numbers of partitions into distinct parts (A026906).at n=25A056871
- Primes p such that p and p^2 have same digit sum.at n=20A058370
- Primes p such that x^18 = 2 has no solution mod p, but x^6 = 2 has a solution mod p.at n=26A059664
- Primes p such that x^54 = 2 has no solution mod p, but x^6 = 2 has a solution mod p.at n=28A059665
- Primes p such that x^36 = 2 has no solution mod p, but x^12 = 2 has a solution mod p.at n=20A059668
- Distinct (non-overlapping) twin Harshad numbers whose sum is prime.at n=41A060288
- Primes with 13 as smallest positive primitive root.at n=33A061326
- Primes of the form 2*n^2 - 1.at n=37A066436
- Primes of the form 2^r*5^s - 1.at n=14A077313
- Primes p such that p-1 and p+1 are both divisible by fourth powers.at n=9A086709
- Primes of the form 8*k^2 - 1.at n=20A090684
- Primes of the form 100n - 1.at n=35A095995