6887449 has 4 divisors (see below), whose sum is σ = 7000420. Its totient is φ = 6774480.

The previous prime is 6887437. The next prime is 6887453. The reversal of 6887449 is 9447886.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 672400 + 6215049 = 820^2 + 2493^2 .

It is a cyclic number.

It is not a de Polignac number, because 6887449 - 2⁵ = 6887417 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6887399 and 6887408.

It is not an unprimeable number, because it can be changed into a prime (6887429) 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, 56394 + ... + 56515.

It is an arithmetic number, because the mean of its divisors is an integer number (1750105).

Almost surely, 2^6887449 is an apocalyptic number.

It is an amenable number.

6887449 is a deficient number, since it is larger than the sum of its proper divisors (112971).

6887449 is a wasteful number, since it uses less digits than its factorization.

6887449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112970.

The product of its digits is 387072, while the sum is 46.

The square root of 6887449 is about 2624.3949778949. The cubic root of 6887449 is about 190.2623246339.

The spelling of 6887449 in words is "six million, eight hundred eighty-seven thousand, four hundred forty-nine".