6859989 has 12 divisors (see below), whose sum is σ = 10077600. Its totient is φ = 4495464.

The previous prime is 6859981. The next prime is 6859991. The reversal of 6859989 is 9899586.

It is not a de Polignac number, because 6859989 - 2³ = 6859981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6859981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5929 + ... + 6990.

It is an arithmetic number, because the mean of its divisors is an integer number (839800).

Almost surely, 2^6859989 is an apocalyptic number.

It is an amenable number.

6859989 is a deficient number, since it is larger than the sum of its proper divisors (3217611).

6859989 is a wasteful number, since it uses less digits than its factorization.

6859989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12984 (or 12981 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 54.

The square root of 6859989 is about 2619.1580708312. The cubic root of 6859989 is about 190.0091316017.

The spelling of 6859989 in words is "six million, eight hundred fifty-nine thousand, nine hundred eighty-nine".