79887871 has 8 divisors (see below), whose sum is σ = 91355264. Its totient is φ = 68434200.

The previous prime is 79887833. The next prime is 79887893. The reversal of 79887871 is 17878897.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79887871 - 2⁹ = 79887359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79887971) 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 7 ways as a sum of consecutive naturals, for example, 17956 + ... + 21958.

It is an arithmetic number, because the mean of its divisors is an integer number (11419408).

Almost surely, 2^79887871 is an apocalyptic number.

79887871 is a deficient number, since it is larger than the sum of its proper divisors (11467393).

79887871 is a wasteful number, since it uses less digits than its factorization.

79887871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6861.

The product of its digits is 1580544, while the sum is 55.

The square root of 79887871 is about 8938.0015104049. The cubic root of 79887871 is about 430.6855317064.

The spelling of 79887871 in words is "seventy-nine million, eight hundred eighty-seven thousand, eight hundred seventy-one".