6886889 has 4 divisors (see below), whose sum is σ = 6953856. Its totient is φ = 6819924.

The previous prime is 6886883. The next prime is 6886897. The reversal of 6886889 is 9886886.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6886889 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6886889.

It is not an unprimeable number, because it can be changed into a prime (6886883) 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, 33329 + ... + 33534.

It is an arithmetic number, because the mean of its divisors is an integer number (1738464).

Almost surely, 2^6886889 is an apocalyptic number.

It is an amenable number.

6886889 is a deficient number, since it is larger than the sum of its proper divisors (66967).

6886889 is a wasteful number, since it uses less digits than its factorization.

6886889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66966.

The product of its digits is 1327104, while the sum is 53.

The square root of 6886889 is about 2624.2882844688. The cubic root of 6886889 is about 190.2571679210.

The spelling of 6886889 in words is "six million, eight hundred eighty-six thousand, eight hundred eighty-nine".