8457443893 has 2 divisors, whose sum is σ = 8457443894. Its totient is φ = 8457443892.

The previous prime is 8457443887. The next prime is 8457443921. The reversal of 8457443893 is 3983447548.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7385339844 + 1072104049 = 85938^2 + 32743^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8457443893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8457443843) 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, 4228721946 + 4228721947.

It is an arithmetic number, because the mean of its divisors is an integer number (4228721947).

Almost surely, 2^8457443893 is an apocalyptic number.

It is an amenable number.

8457443893 is a deficient number, since it is larger than the sum of its proper divisors (1).

8457443893 is an equidigital number, since it uses as much as digits as its factorization.

8457443893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11612160, while the sum is 55.

The square root of 8457443893 is about 91964.3620811888. The cubic root of 8457443893 is about 2037.4159815205.

The spelling of 8457443893 in words is "eight billion, four hundred fifty-seven million, four hundred forty-three thousand, eight hundred ninety-three".