389320873 has 2 divisors, whose sum is σ = 389320874. Its totient is φ = 389320872.

The previous prime is 389320831. The next prime is 389320901. The reversal of 389320873 is 378023983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 383689744 + 5631129 = 19588^2 + 2373^2 .

It is a cyclic number.

It is not a de Polignac number, because 389320873 - 2²⁵ = 355766441 is a prime.

It is not a weakly prime, because it can be changed into another prime (389320823) 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, 194660436 + 194660437.

It is an arithmetic number, because the mean of its divisors is an integer number (194660437).

Almost surely, 2^389320873 is an apocalyptic number.

It is an amenable number.

389320873 is a deficient number, since it is larger than the sum of its proper divisors (1).

389320873 is an equidigital number, since it uses as much as digits as its factorization.

389320873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 389320873 is about 19731.2157000019. The cubic root of 389320873 is about 730.1900255913.

The spelling of 389320873 in words is "three hundred eighty-nine million, three hundred twenty thousand, eight hundred seventy-three".