2687863 has 4 divisors (see below), whose sum is σ = 2733480. Its totient is φ = 2642248.

The previous prime is 2687857. The next prime is 2687869. The reversal of 2687863 is 3687862.

It is a happy number.

2687863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (2687857) and next prime (2687869).

It is a cyclic number.

It is not a de Polignac number, because 2687863 - 2¹⁷ = 2556791 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2687869) 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, 22720 + ... + 22837.

It is an arithmetic number, because the mean of its divisors is an integer number (683370).

2^2687863 is an apocalyptic number.

2687863 is a deficient number, since it is larger than the sum of its proper divisors (45617).

2687863 is an equidigital number, since it uses as much as digits as its factorization.

2687863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45616.

The product of its digits is 96768, while the sum is 40.

The square root of 2687863 is about 1639.4703412993. The cubic root of 2687863 is about 139.0387035745.

Subtracting 2687863 from its reverse (3687862), we obtain a palindrome (999999).

The spelling of 2687863 in words is "two million, six hundred eighty-seven thousand, eight hundred sixty-three".