79657879 has 18 divisors (see below), whose sum is σ = 96071904. Its totient is φ = 65787120.

The previous prime is 79657873. The next prime is 79657883. The reversal of 79657879 is 97875697.

It is not a de Polignac number, because 79657879 - 2¹⁷ = 79526807 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 (79657873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 347737 + ... + 347965.

It is an arithmetic number, because the mean of its divisors is an integer number (5337328).

Almost surely, 2^79657879 is an apocalyptic number.

79657879 is a deficient number, since it is larger than the sum of its proper divisors (16414025).

79657879 is an equidigital number, since it uses as much as digits as its factorization.

79657879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503 (or 267 counting only the distinct ones).

The product of its digits is 6667920, while the sum is 58.

The square root of 79657879 is about 8925.1262736165. The cubic root of 79657879 is about 430.2718292056.

The spelling of 79657879 in words is "seventy-nine million, six hundred fifty-seven thousand, eight hundred seventy-nine".