6787887 has 4 divisors (see below), whose sum is σ = 9050520. Its totient is φ = 4525256.

The previous prime is 6787873. The next prime is 6787889. The reversal of 6787887 is 7887876.

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 6787887 - 2⁴ = 6787871 is a prime.

It is a D-number.

6787887 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6787889) 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, 1131312 + ... + 1131317.

It is an arithmetic number, because the mean of its divisors is an integer number (2262630).

Almost surely, 2^6787887 is an apocalyptic number.

6787887 is a deficient number, since it is larger than the sum of its proper divisors (2262633).

6787887 is a wasteful number, since it uses less digits than its factorization.

6787887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2262632.

The product of its digits is 1053696, while the sum is 51.

The square root of 6787887 is about 2605.3573651229. The cubic root of 6787887 is about 189.3410878290.

Subtracting from 6787887 its product of digits (1053696), we obtain a triangular number (5734191 = T₃₃₈₆).

The spelling of 6787887 in words is "six million, seven hundred eighty-seven thousand, eight hundred eighty-seven".