79079905 has 4 divisors (see below), whose sum is σ = 94895892. Its totient is φ = 63263920.

The previous prime is 79079893. The next prime is 79079909. The reversal of 79079905 is 50997097.

79079905 is nontrivially palindromic in base 4.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50997097 = 43 ⋅1185979.

It can be written as a sum of positive squares in 2 ways, for example, as 25160256 + 53919649 = 5016^2 + 7343^2 .

It is not a de Polignac number, because 79079905 - 2²¹ = 76982753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79079909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7907986 + ... + 7907995.

It is an arithmetic number, because the mean of its divisors is an integer number (23723973).

Almost surely, 2^79079905 is an apocalyptic number.

It is an amenable number.

79079905 is a deficient number, since it is larger than the sum of its proper divisors (15815987).

79079905 is a wasteful number, since it uses less digits than its factorization.

79079905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15815986.

The product of its (nonzero) digits is 178605, while the sum is 46.

The square root of 79079905 is about 8892.6882887010. The cubic root of 79079905 is about 429.2286604551.

The spelling of 79079905 in words is "seventy-nine million, seventy-nine thousand, nine hundred five".