2687859 has 6 divisors (see below), whose sum is σ = 3882476. Its totient is φ = 1791900.

The previous prime is 2687857. The next prime is 2687869. The reversal of 2687859 is 9587862.

It is not a de Polignac number, because 2687859 - 2¹ = 2687857 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2687851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 149317 + ... + 149334.

2^2687859 is an apocalyptic number.

2687859 is a deficient number, since it is larger than the sum of its proper divisors (1194617).

2687859 is a wasteful number, since it uses less digits than its factorization.

2687859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298657 (or 298654 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 2687859 is about 1639.4691213927. The cubic root of 2687859 is about 139.0386346034.

The spelling of 2687859 in words is "two million, six hundred eighty-seven thousand, eight hundred fifty-nine".