2688671 has 4 divisors (see below), whose sum is σ = 2830200. Its totient is φ = 2547144.

The previous prime is 2688667. The next prime is 2688701. The reversal of 2688671 is 1768862.

2688671 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 2688671 - 2² = 2688667 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 (2688611) 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, 70736 + ... + 70773.

It is an arithmetic number, because the mean of its divisors is an integer number (707550).

2^2688671 is an apocalyptic number.

2688671 is a deficient number, since it is larger than the sum of its proper divisors (141529).

2688671 is a wasteful number, since it uses less digits than its factorization.

2688671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141528.

The product of its digits is 32256, while the sum is 38.

The square root of 2688671 is about 1639.7167438311. The cubic root of 2688671 is about 139.0526343462.

The spelling of 2688671 in words is "two million, six hundred eighty-eight thousand, six hundred seventy-one".