55989443 has 2 divisors, whose sum is σ = 55989444. Its totient is φ = 55989442.

The previous prime is 55989431. The next prime is 55989457. The reversal of 55989443 is 34498955.

55989443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55989443 - 2⁸ = 55989187 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55989403) 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, 27994721 + 27994722.

It is an arithmetic number, because the mean of its divisors is an integer number (27994722).

Almost surely, 2^55989443 is an apocalyptic number.

55989443 is a deficient number, since it is larger than the sum of its proper divisors (1).

55989443 is an equidigital number, since it uses as much as digits as its factorization.

55989443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 47.

The square root of 55989443 is about 7482.6093710684. The cubic root of 55989443 is about 382.5621935977.

The spelling of 55989443 in words is "fifty-five million, nine hundred eighty-nine thousand, four hundred forty-three".