79109 has 4 divisors (see below), whose sum is σ = 79680. Its totient is φ = 78540.

The previous prime is 79103. The next prime is 79111. The reversal of 79109 is 90197.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 79109 - 2⁸ = 78853 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74 + ... + 404.

It is an arithmetic number, because the mean of its divisors is an integer number (19920).

2⁷⁹¹⁰⁹ is an apocalyptic number.

It is an amenable number.

79109 is a deficient number, since it is larger than the sum of its proper divisors (571).

79109 is a wasteful number, since it uses less digits than its factorization.

79109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570.

The product of its (nonzero) digits is 567, while the sum is 26.

The square root of 79109 is about 281.2632219114. The cubic root of 79109 is about 42.9281294461.

The spelling of 79109 in words is "seventy-nine thousand, one hundred nine".