56449439 has 2 divisors, whose sum is σ = 56449440. Its totient is φ = 56449438.

The previous prime is 56449433. The next prime is 56449451. The reversal of 56449439 is 93494465.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56449439 - 2¹² = 56445343 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56449439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56449433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28224719 + 28224720.

It is an arithmetic number, because the mean of its divisors is an integer number (28224720).

Almost surely, 2^56449439 is an apocalyptic number.

56449439 is a deficient number, since it is larger than the sum of its proper divisors (1).

56449439 is an equidigital number, since it uses as much as digits as its factorization.

56449439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 44.

The square root of 56449439 is about 7513.2841687241. The cubic root of 56449439 is about 383.6070175767.

The spelling of 56449439 in words is "fifty-six million, four hundred forty-nine thousand, four hundred thirty-nine".