2871839 has 4 divisors (see below), whose sum is σ = 2878224. Its totient is φ = 2865456.

The previous prime is 2871833. The next prime is 2871853. The reversal of 2871839 is 9381782.

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 2871839 - 2¹² = 2867743 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 (2871833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2462 + ... + 3435.

It is an arithmetic number, because the mean of its divisors is an integer number (719556).

2^2871839 is an apocalyptic number.

2871839 is a deficient number, since it is larger than the sum of its proper divisors (6385).

2871839 is an equidigital number, since it uses as much as digits as its factorization.

2871839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6384.

The product of its digits is 24192, while the sum is 38.

The square root of 2871839 is about 1694.6501113799. The cubic root of 2871839 is about 142.1412170499.

The spelling of 2871839 in words is "two million, eight hundred seventy-one thousand, eight hundred thirty-nine".