79871239 has 16 divisors (see below), whose sum is σ = 93877056. Its totient is φ = 66528000.

The previous prime is 79871227. The next prime is 79871243. The reversal of 79871239 is 93217897.

It is a happy number.

It is not a de Polignac number, because 79871239 - 2¹⁵ = 79838471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79871039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113589 + ... + 114289.

It is an arithmetic number, because the mean of its divisors is an integer number (5867316).

Almost surely, 2^79871239 is an apocalyptic number.

79871239 is a deficient number, since it is larger than the sum of its proper divisors (14005817).

79871239 is a wasteful number, since it uses less digits than its factorization.

79871239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146.

The product of its digits is 190512, while the sum is 46.

The square root of 79871239 is about 8937.0710526436. The cubic root of 79871239 is about 430.6556412327.

The spelling of 79871239 in words is "seventy-nine million, eight hundred seventy-one thousand, two hundred thirty-nine".