79086217 has 4 divisors (see below), whose sum is σ = 90384256. Its totient is φ = 67788180.

The previous prime is 79086211. The next prime is 79086221. The reversal of 79086217 is 71268097.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 79086217 - 2³ = 79086209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79086217.

It is not an unprimeable number, because it can be changed into a prime (79086211) 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, 5649009 + ... + 5649022.

It is an arithmetic number, because the mean of its divisors is an integer number (22596064).

Almost surely, 2^79086217 is an apocalyptic number.

It is an amenable number.

79086217 is a deficient number, since it is larger than the sum of its proper divisors (11298039).

79086217 is a wasteful number, since it uses less digits than its factorization.

79086217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11298038.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 79086217 is about 8893.0431799244. The cubic root of 79086217 is about 429.2400802093.

The spelling of 79086217 in words is "seventy-nine million, eighty-six thousand, two hundred seventeen".