6879891871 has 4 divisors (see below), whose sum is σ = 6898045000. Its totient is φ = 6861738744.

The previous prime is 6879891839. The next prime is 6879891911. The reversal of 6879891871 is 1781989786.

It is a happy number.

6879891871 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 6879891871 - 2⁵ = 6879891839 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 (6879811871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9075996 + ... + 9076753.

It is an arithmetic number, because the mean of its divisors is an integer number (1724511250).

Almost surely, 2^6879891871 is an apocalyptic number.

6879891871 is a deficient number, since it is larger than the sum of its proper divisors (18153129).

6879891871 is a wasteful number, since it uses less digits than its factorization.

6879891871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18153128.

The product of its digits is 12192768, while the sum is 64.

The square root of 6879891871 is about 82945.1136053234. The cubic root of 6879891871 is about 1901.9271186760.

The spelling of 6879891871 in words is "six billion, eight hundred seventy-nine million, eight hundred ninety-one thousand, eight hundred seventy-one".