79870017 has 4 divisors (see below), whose sum is σ = 106493360. Its totient is φ = 53246676.

The previous prime is 79870003. The next prime is 79870019. The reversal of 79870017 is 71007897.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 71007897 = 3 ⋅23669299.

It is not a de Polignac number, because 79870017 - 2⁴ = 79870001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79870019) 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, 13311667 + ... + 13311672.

It is an arithmetic number, because the mean of its divisors is an integer number (26623340).

Almost surely, 2^79870017 is an apocalyptic number.

It is an amenable number.

79870017 is a deficient number, since it is larger than the sum of its proper divisors (26623343).

79870017 is a wasteful number, since it uses less digits than its factorization.

79870017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26623342.

The product of its (nonzero) digits is 24696, while the sum is 39.

The square root of 79870017 is about 8937.0026854645. The cubic root of 79870017 is about 430.6534449315.

The spelling of 79870017 in words is "seventy-nine million, eight hundred seventy thousand, seventeen".