79634879 has 4 divisors (see below), whose sum is σ = 79894584. Its totient is φ = 79375176.

The previous prime is 79634869. The next prime is 79634881. The reversal of 79634879 is 97843697.

79634879 = 7² + 8² + ... + 620².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97843697 = 7 ⋅13977671.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79634879 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 79634879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79634869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129392 + ... + 130005.

It is an arithmetic number, because the mean of its divisors is an integer number (19973646).

Almost surely, 2^79634879 is an apocalyptic number.

79634879 is a deficient number, since it is larger than the sum of its proper divisors (259705).

79634879 is a wasteful number, since it uses less digits than its factorization.

79634879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259704.

The product of its digits is 2286144, while the sum is 53.

The square root of 79634879 is about 8923.8376834185. The cubic root of 79634879 is about 430.2304137390.

The spelling of 79634879 in words is "seventy-nine million, six hundred thirty-four thousand, eight hundred seventy-nine".