6887399 has 4 divisors (see below), whose sum is σ = 6990264. Its totient is φ = 6784536.

The previous prime is 6887393. The next prime is 6887411. The reversal of 6887399 is 9937886.

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 6887399 - 2¹⁶ = 6821863 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 (6887393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51332 + ... + 51465.

It is an arithmetic number, because the mean of its divisors is an integer number (1747566).

Almost surely, 2^6887399 is an apocalyptic number.

6887399 is a deficient number, since it is larger than the sum of its proper divisors (102865).

6887399 is a wasteful number, since it uses less digits than its factorization.

6887399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102864.

The product of its digits is 653184, while the sum is 50.

The square root of 6887399 is about 2624.3854518725. The cubic root of 6887399 is about 190.2618642244.

The spelling of 6887399 in words is "six million, eight hundred eighty-seven thousand, three hundred ninety-nine".