6887709 has 24 divisors (see below), whose sum is σ = 10707840. Its totient is φ = 4252608.

The previous prime is 6887681. The next prime is 6887753. The reversal of 6887709 is 9077886.

It is not a de Polignac number, because 6887709 - 2⁵ = 6887677 is a prime.

6887709 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6887759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7609 + ... + 8465.

It is an arithmetic number, because the mean of its divisors is an integer number (446160).

Almost surely, 2^6887709 is an apocalyptic number.

It is an amenable number.

6887709 is a deficient number, since it is larger than the sum of its proper divisors (3820131).

6887709 is a wasteful number, since it uses less digits than its factorization.

6887709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929 (or 926 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The square root of 6887709 is about 2624.4445126541. Note that the first 3 decimals coincide. The cubic root of 6887709 is about 190.2647187269.

The spelling of 6887709 in words is "six million, eight hundred eighty-seven thousand, seven hundred nine".