79857205 has 16 divisors (see below), whose sum is σ = 97441344. Its totient is φ = 62818560.

The previous prime is 79857187. The next prime is 79857221. The reversal of 79857205 is 50275897.

It is not a de Polignac number, because 79857205 - 2¹⁹ = 79332917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139570 + ... + 140140.

It is an arithmetic number, because the mean of its divisors is an integer number (6090084).

Almost surely, 2^79857205 is an apocalyptic number.

It is an amenable number.

79857205 is a deficient number, since it is larger than the sum of its proper divisors (17584139).

79857205 is a wasteful number, since it uses less digits than its factorization.

79857205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996.

The product of its (nonzero) digits is 176400, while the sum is 43.

The square root of 79857205 is about 8936.2858615870. The cubic root of 79857205 is about 430.6304165696.

The spelling of 79857205 in words is "seventy-nine million, eight hundred fifty-seven thousand, two hundred five".