79085915 has 4 divisors (see below), whose sum is σ = 94903104. Its totient is φ = 63268728.

The previous prime is 79085899. The next prime is 79085917. The reversal of 79085915 is 51958097.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79085915 - 2⁴ = 79085899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79085917) 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, 7908587 + ... + 7908596.

It is an arithmetic number, because the mean of its divisors is an integer number (23725776).

Almost surely, 2^79085915 is an apocalyptic number.

79085915 is a deficient number, since it is larger than the sum of its proper divisors (15817189).

79085915 is a wasteful number, since it uses less digits than its factorization.

79085915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15817188.

The product of its (nonzero) digits is 113400, while the sum is 44.

The square root of 79085915 is about 8893.0262003437. The cubic root of 79085915 is about 429.2395338407.

The spelling of 79085915 in words is "seventy-nine million, eighty-five thousand, nine hundred fifteen".