79091013 has 16 divisors (see below), whose sum is σ = 109093376. Its totient is φ = 50915520.

The previous prime is 79091011. The next prime is 79091017. The reversal of 79091013 is 31019097.

It is not a de Polignac number, because 79091013 - 2¹ = 79091011 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79091011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78831 + ... + 79827.

It is an arithmetic number, because the mean of its divisors is an integer number (6818336).

Almost surely, 2^79091013 is an apocalyptic number.

It is an amenable number.

79091013 is a deficient number, since it is larger than the sum of its proper divisors (30002363).

79091013 is a wasteful number, since it uses less digits than its factorization.

79091013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1884.

The product of its (nonzero) digits is 1701, while the sum is 30.

The square root of 79091013 is about 8893.3128248139. The cubic root of 79091013 is about 429.2487567899.

The spelling of 79091013 in words is "seventy-nine million, ninety-one thousand, thirteen".