79865679 has 4 divisors (see below), whose sum is σ = 106487576. Its totient is φ = 53243784.

The previous prime is 79865659. The next prime is 79865689. The reversal of 79865679 is 97656897.

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

It is not a de Polignac number, because 79865679 - 2¹³ = 79857487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79865659) 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, 13310944 + ... + 13310949.

It is an arithmetic number, because the mean of its divisors is an integer number (26621894).

Almost surely, 2^79865679 is an apocalyptic number.

79865679 is a deficient number, since it is larger than the sum of its proper divisors (26621897).

79865679 is a wasteful number, since it uses less digits than its factorization.

79865679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26621896.

The product of its digits is 5715360, while the sum is 57.

The square root of 79865679 is about 8936.7599833497. The cubic root of 79865679 is about 430.6456480613.

The spelling of 79865679 in words is "seventy-nine million, eight hundred sixty-five thousand, six hundred seventy-nine".