2691887 has 6 divisors (see below), whose sum is σ = 2958984. Its totient is φ = 2447060.

The previous prime is 2691853. The next prime is 2691893. The reversal of 2691887 is 7881962.

2691887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2691887 - 2⁸ = 2691631 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 (2691827) 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 5 ways as a sum of consecutive naturals, for example, 11003 + ... + 11244.

It is an arithmetic number, because the mean of its divisors is an integer number (493164).

2^2691887 is an apocalyptic number.

2691887 is a deficient number, since it is larger than the sum of its proper divisors (267097).

2691887 is a wasteful number, since it uses less digits than its factorization.

2691887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22269 (or 22258 counting only the distinct ones).

The product of its digits is 48384, while the sum is 41.

The square root of 2691887 is about 1640.6971079392. The cubic root of 2691887 is about 139.1080539308.

The spelling of 2691887 in words is "two million, six hundred ninety-one thousand, eight hundred eighty-seven".