6881887 has 4 divisors (see below), whose sum is σ = 6891736. Its totient is φ = 6872040.

The previous prime is 6881873. The next prime is 6881893. The reversal of 6881887 is 7881886.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7881886 = 2 ⋅3940943.

It is a cyclic number.

It is not a de Polignac number, because 6881887 - 2⁷ = 6881759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6881087) 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 3 ways as a sum of consecutive naturals, for example, 3789 + ... + 5302.

It is an arithmetic number, because the mean of its divisors is an integer number (1722934).

Almost surely, 2^6881887 is an apocalyptic number.

6881887 is a deficient number, since it is larger than the sum of its proper divisors (9849).

6881887 is an equidigital number, since it uses as much as digits as its factorization.

6881887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9848.

The product of its digits is 172032, while the sum is 46.

The square root of 6881887 is about 2623.3350910625. The cubic root of 6881887 is about 190.2110950209.

Subtracting 6881887 from its reverse (7881886), we obtain a palindrome (999999).

The spelling of 6881887 in words is "six million, eight hundred eighty-one thousand, eight hundred eighty-seven".