2011323439 has 4 divisors (see below), whose sum is σ = 2012082520. Its totient is φ = 2010564360.

The previous prime is 2011323437. The next prime is 2011323497. The reversal of 2011323439 is 9343231102.

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 2011323439 - 2¹ = 2011323437 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 (2011323437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375552 + ... + 380869.

It is an arithmetic number, because the mean of its divisors is an integer number (503020630).

Almost surely, 2^2011323439 is an apocalyptic number.

2011323439 is a deficient number, since it is larger than the sum of its proper divisors (759081).

2011323439 is an equidigital number, since it uses as much as digits as its factorization.

2011323439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759080.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 2011323439 is about 44847.7807589183. The cubic root of 2011323439 is about 1262.2943497205.

The spelling of 2011323439 in words is "two billion, eleven million, three hundred twenty-three thousand, four hundred thirty-nine".