2591839 has 2 divisors, whose sum is σ = 2591840. Its totient is φ = 2591838.

The previous prime is 2591821. The next prime is 2591843. The reversal of 2591839 is 9381952.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2591839 - 2⁵ = 2591807 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2591798 and 2591807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2591819) 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 as a sum of consecutive naturals, namely, 1295919 + 1295920.

It is an arithmetic number, because the mean of its divisors is an integer number (1295920).

2^2591839 is an apocalyptic number.

2591839 is a deficient number, since it is larger than the sum of its proper divisors (1).

2591839 is an equidigital number, since it uses as much as digits as its factorization.

2591839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 37.

The square root of 2591839 is about 1609.9189420589. The cubic root of 2591839 is about 137.3628649272.

The spelling of 2591839 in words is "two million, five hundred ninety-one thousand, eight hundred thirty-nine".