6987687 has 32 divisors (see below), whose sum is σ = 11397120. Its totient is φ = 3719520.

The previous prime is 6987683. The next prime is 6987703. The reversal of 6987687 is 7867896.

It is a happy number.

It is not a de Polignac number, because 6987687 - 2² = 6987683 is a prime.

6987687 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6987683) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33012 + ... + 33222.

It is an arithmetic number, because the mean of its divisors is an integer number (356160).

Almost surely, 2^6987687 is an apocalyptic number.

6987687 is a deficient number, since it is larger than the sum of its proper divisors (4409433).

6987687 is a wasteful number, since it uses less digits than its factorization.

6987687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323.

The product of its digits is 1016064, while the sum is 51.

The square root of 6987687 is about 2643.4233486144. The cubic root of 6987687 is about 191.1808909172.

It can be divided in two parts, 698 and 7687, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 6987687 in words is "six million, nine hundred eighty-seven thousand, six hundred eighty-seven".