79136805 has 32 divisors (see below), whose sum is σ = 145405440. Its totient is φ = 36348480.

The previous prime is 79136803. The next prime is 79136851. The reversal of 79136805 is 50863197.

It is not a de Polignac number, because 79136805 - 2¹ = 79136803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79136803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9487 + ... + 15756.

It is an arithmetic number, because the mean of its divisors is an integer number (4543920).

Almost surely, 2^79136805 is an apocalyptic number.

It is an amenable number.

79136805 is a deficient number, since it is larger than the sum of its proper divisors (66268635).

79136805 is a wasteful number, since it uses less digits than its factorization.

79136805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25281.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 79136805 is about 8895.8869709546. The cubic root of 79136805 is about 429.3315827480.

The spelling of 79136805 in words is "seventy-nine million, one hundred thirty-six thousand, eight hundred five".