871984679 has 4 divisors (see below), whose sum is σ = 893252640. Its totient is φ = 850716720.

The previous prime is 871984657. The next prime is 871984703. The reversal of 871984679 is 976489178.

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 871984679 - 2¹² = 871980583 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 (871984609) 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 3 ways as a sum of consecutive naturals, for example, 10633919 + ... + 10634000.

It is an arithmetic number, because the mean of its divisors is an integer number (223313160).

Almost surely, 2^871984679 is an apocalyptic number.

871984679 is a deficient number, since it is larger than the sum of its proper divisors (21267961).

871984679 is a wasteful number, since it uses less digits than its factorization.

871984679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21267960.

The product of its digits is 6096384, while the sum is 59.

The square root of 871984679 is about 29529.3867020634. The cubic root of 871984679 is about 955.3656408980.

The spelling of 871984679 in words is "eight hundred seventy-one million, nine hundred eighty-four thousand, six hundred seventy-nine".