2687786867 has 4 divisors (see below), whose sum is σ = 2708304456. Its totient is φ = 2667269280.

The previous prime is 2687786861. The next prime is 2687786869. The reversal of 2687786867 is 7686877862.

2687786867 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 a cyclic number.

It is not a de Polignac number, because 2687786867 - 2¹⁴ = 2687770483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2687786861) 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, 10258598 + ... + 10258859.

It is an arithmetic number, because the mean of its divisors is an integer number (677076114).

Almost surely, 2^2687786867 is an apocalyptic number.

2687786867 is a deficient number, since it is larger than the sum of its proper divisors (20517589).

2687786867 is a wasteful number, since it uses less digits than its factorization.

2687786867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20517588.

The product of its digits is 75866112, while the sum is 65.

The square root of 2687786867 is about 51843.8701005239. The cubic root of 2687786867 is about 1390.3739081744.

The spelling of 2687786867 in words is "two billion, six hundred eighty-seven million, seven hundred eighty-six thousand, eight hundred sixty-seven".