79117513 has 4 divisors (see below), whose sum is σ = 79135488. Its totient is φ = 79099540.

The previous prime is 79117477. The next prime is 79117523. The reversal of 79117513 is 31571197.

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 79117513 - 2⁹ = 79117001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79117523) 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, 2568 + ... + 12838.

It is an arithmetic number, because the mean of its divisors is an integer number (19783872).

Almost surely, 2^79117513 is an apocalyptic number.

It is an amenable number.

79117513 is a deficient number, since it is larger than the sum of its proper divisors (17975).

79117513 is a wasteful number, since it uses less digits than its factorization.

79117513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17974.

The product of its digits is 6615, while the sum is 34.

The square root of 79117513 is about 8894.8025835316. The cubic root of 79117513 is about 429.2966923746.

The spelling of 79117513 in words is "seventy-nine million, one hundred seventeen thousand, five hundred thirteen".