6887649 has 16 divisors (see below), whose sum is σ = 9654912. Its totient is φ = 4359168.

The previous prime is 6887627. The next prime is 6887663. The reversal of 6887649 is 9467886.

6887649 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6887649 - 2⁸ = 6887393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6887598 and 6887607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6887609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11649 + ... + 12225.

It is an arithmetic number, because the mean of its divisors is an integer number (603432).

Almost surely, 2^6887649 is an apocalyptic number.

6887649 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

6887649 is a deficient number, since it is larger than the sum of its proper divisors (2767263).

6887649 is a wasteful number, since it uses less digits than its factorization.

6887649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776.

The product of its digits is 580608, while the sum is 48.

The square root of 6887649 is about 2624.4330816388. The cubic root of 6887649 is about 190.2641662493.

The spelling of 6887649 in words is "six million, eight hundred eighty-seven thousand, six hundred forty-nine".