79884871 has 4 divisors (see below), whose sum is σ = 87147144. Its totient is φ = 72622600.

The previous prime is 79884863. The next prime is 79884877. The reversal of 79884871 is 17848897.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79884871 - 2³ = 79884863 is a prime.

It is a super-2 number, since 2×79884871² = 12763185229373282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79884877) 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 3 ways as a sum of consecutive naturals, for example, 3631120 + ... + 3631141.

It is an arithmetic number, because the mean of its divisors is an integer number (21786786).

Almost surely, 2^79884871 is an apocalyptic number.

79884871 is a deficient number, since it is larger than the sum of its proper divisors (7262273).

79884871 is a wasteful number, since it uses less digits than its factorization.

79884871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7262272.

The product of its digits is 903168, while the sum is 52.

The square root of 79884871 is about 8937.8336860785. The cubic root of 79884871 is about 430.6801405135.

The spelling of 79884871 in words is "seventy-nine million, eight hundred eighty-four thousand, eight hundred seventy-one".