55789439 has 2 divisors, whose sum is σ = 55789440. Its totient is φ = 55789438.

The previous prime is 55789411. The next prime is 55789477. The reversal of 55789439 is 93498755.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55789439 - 2⁸ = 55789183 is a prime.

It is a super-2 number, since 2×55789439² = 6224923007869442, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55719439) 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, 27894719 + 27894720.

It is an arithmetic number, because the mean of its divisors is an integer number (27894720).

Almost surely, 2^55789439 is an apocalyptic number.

55789439 is a deficient number, since it is larger than the sum of its proper divisors (1).

55789439 is an equidigital number, since it uses as much as digits as its factorization.

55789439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1360800, while the sum is 50.

The square root of 55789439 is about 7469.2328253978. The cubic root of 55789439 is about 382.1061239463.

The spelling of 55789439 in words is "fifty-five million, seven hundred eighty-nine thousand, four hundred thirty-nine".