2143687 has 8 divisors (see below), whose sum is σ = 2638496. Its totient is φ = 1696032.

The previous prime is 2143667. The next prime is 2143711. The reversal of 2143687 is 7863412.

2143687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-2143687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143627) 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 7 ways as a sum of consecutive naturals, for example, 11688 + ... + 11869.

It is an arithmetic number, because the mean of its divisors is an integer number (329812).

2^2143687 is an apocalyptic number.

2143687 is a deficient number, since it is larger than the sum of its proper divisors (494809).

2143687 is a wasteful number, since it uses less digits than its factorization.

2143687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23577.

The product of its digits is 8064, while the sum is 31.

The square root of 2143687 is about 1464.1335321616. The cubic root of 2143687 is about 128.9398393435.

The spelling of 2143687 in words is "two million, one hundred forty-three thousand, six hundred eighty-seven".