6887287 has 4 divisors (see below), whose sum is σ = 7513416. Its totient is φ = 6261160.

The previous prime is 6887273. The next prime is 6887339. The reversal of 6887287 is 7827886.

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 6887287 - 2¹⁹ = 6362999 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 (6882287) 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, 313048 + ... + 313069.

It is an arithmetic number, because the mean of its divisors is an integer number (1878354).

Almost surely, 2^6887287 is an apocalyptic number.

6887287 is a deficient number, since it is larger than the sum of its proper divisors (626129).

6887287 is a wasteful number, since it uses less digits than its factorization.

6887287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626128.

The product of its digits is 301056, while the sum is 46.

The square root of 6887287 is about 2624.3641134568. The cubic root of 6887287 is about 190.2608328992.

The spelling of 6887287 in words is "six million, eight hundred eighty-seven thousand, two hundred eighty-seven".