79805911 has 16 divisors (see below), whose sum is σ = 83349504. Its totient is φ = 76374144.

The previous prime is 79805903. The next prime is 79805927. The reversal of 79805911 is 11950897.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 79805911 - 2³ = 79805903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79205911) 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, 628330 + ... + 628456.

It is an arithmetic number, because the mean of its divisors is an integer number (5209344).

Almost surely, 2^79805911 is an apocalyptic number.

79805911 is a deficient number, since it is larger than the sum of its proper divisors (3543593).

79805911 is a wasteful number, since it uses less digits than its factorization.

79805911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390.

The product of its (nonzero) digits is 22680, while the sum is 40.

The square root of 79805911 is about 8933.4154162896. The cubic root of 79805911 is about 430.5381957627.

The spelling of 79805911 in words is "seventy-nine million, eight hundred five thousand, nine hundred eleven".