6864687 has 6 divisors (see below), whose sum is σ = 9915672. Its totient is φ = 4576452.

The previous prime is 6864661. The next prime is 6864691. The reversal of 6864687 is 7864686.

It is a happy number.

It is not a de Polignac number, because 6864687 - 2⁶ = 6864623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6864607) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 381363 + ... + 381380.

It is an arithmetic number, because the mean of its divisors is an integer number (1652612).

Almost surely, 2^6864687 is an apocalyptic number.

6864687 is a deficient number, since it is larger than the sum of its proper divisors (3050985).

6864687 is a wasteful number, since it uses less digits than its factorization.

6864687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762749 (or 762746 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 6864687 is about 2620.0547704199. The cubic root of 6864687 is about 190.0524970357.

Subtracting 6864687 from its reverse (7864686), we obtain a palindrome (999999).

The spelling of 6864687 in words is "six million, eight hundred sixty-four thousand, six hundred eighty-seven".