389940193 has 2 divisors, whose sum is σ = 389940194. Its totient is φ = 389940192.

The previous prime is 389940139. The next prime is 389940259. The reversal of 389940193 is 391049983.

Together with previous prime (389940139) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 376049664 + 13890529 = 19392^2 + 3727^2 .

It is a cyclic number.

It is not a de Polignac number, because 389940193 - 2¹³ = 389932001 is a prime.

It is not a weakly prime, because it can be changed into another prime (389940113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194970096 + 194970097.

It is an arithmetic number, because the mean of its divisors is an integer number (194970097).

Almost surely, 2^389940193 is an apocalyptic number.

It is an amenable number.

389940193 is a deficient number, since it is larger than the sum of its proper divisors (1).

389940193 is an equidigital number, since it uses as much as digits as its factorization.

389940193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 389940193 is about 19746.9033774919. The cubic root of 389940193 is about 730.5770086143.

The spelling of 389940193 in words is "three hundred eighty-nine million, nine hundred forty thousand, one hundred ninety-three".