2839891 has 4 divisors (see below), whose sum is σ = 2846800. Its totient is φ = 2832984.

The previous prime is 2839871. The next prime is 2839913. The reversal of 2839891 is 1989382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1989382 = 2 ⋅994691.

It is a cyclic number.

It is not a de Polignac number, because 2839891 - 2¹¹ = 2837843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2839801) 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, 2796 + ... + 3673.

It is an arithmetic number, because the mean of its divisors is an integer number (711700).

2^2839891 is an apocalyptic number.

2839891 is a deficient number, since it is larger than the sum of its proper divisors (6909).

2839891 is an equidigital number, since it uses as much as digits as its factorization.

2839891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6908.

The product of its digits is 31104, while the sum is 40.

The square root of 2839891 is about 1685.1976145248. The cubic root of 2839891 is about 141.6121632704.

The spelling of 2839891 in words is "two million, eight hundred thirty-nine thousand, eight hundred ninety-one".