2391439 has 2 divisors, whose sum is σ = 2391440. Its totient is φ = 2391438.

The previous prime is 2391437. The next prime is 2391449. The reversal of 2391439 is 9341932.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2391439 - 2¹ = 2391437 is a prime.

Together with 2391437, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2391439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2391437) 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, 1195719 + 1195720.

It is an arithmetic number, because the mean of its divisors is an integer number (1195720).

2^2391439 is an apocalyptic number.

2391439 is a deficient number, since it is larger than the sum of its proper divisors (1).

2391439 is an equidigital number, since it uses as much as digits as its factorization.

2391439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 31.

The square root of 2391439 is about 1546.4278192014. The cubic root of 2391439 is about 133.7272054787.

The spelling of 2391439 in words is "two million, three hundred ninety-one thousand, four hundred thirty-nine".