79243513 has 4 divisors (see below), whose sum is σ = 80426320. Its totient is φ = 78060708.

The previous prime is 79243499. The next prime is 79243519. The reversal of 79243513 is 31534297.

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 79243513 - 2⁵ = 79243481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79243519) 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, 591303 + ... + 591436.

It is an arithmetic number, because the mean of its divisors is an integer number (20106580).

Almost surely, 2^79243513 is an apocalyptic number.

It is an amenable number.

79243513 is a deficient number, since it is larger than the sum of its proper divisors (1182807).

79243513 is a wasteful number, since it uses less digits than its factorization.

79243513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182806.

The product of its digits is 22680, while the sum is 34.

The square root of 79243513 is about 8901.8825537074. The cubic root of 79243513 is about 429.5244661921.

The spelling of 79243513 in words is "seventy-nine million, two hundred forty-three thousand, five hundred thirteen".