57443989 has 2 divisors, whose sum is σ = 57443990. Its totient is φ = 57443988.

The previous prime is 57443929. The next prime is 57443999. The reversal of 57443989 is 98934475.

57443989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51480625 + 5963364 = 7175^2 + 2442^2 .

It is a cyclic number.

It is not a de Polignac number, because 57443989 - 2¹¹ = 57441941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57443909) 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, 28721994 + 28721995.

It is an arithmetic number, because the mean of its divisors is an integer number (28721995).

Almost surely, 2^57443989 is an apocalyptic number.

It is an amenable number.

57443989 is a deficient number, since it is larger than the sum of its proper divisors (1).

57443989 is an equidigital number, since it uses as much as digits as its factorization.

57443989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 49.

The square root of 57443989 is about 7579.1812882395. The cubic root of 57443989 is about 385.8467650421.

The spelling of 57443989 in words is "fifty-seven million, four hundred forty-three thousand, nine hundred eighty-nine".