389919139 has 2 divisors, whose sum is σ = 389919140. Its totient is φ = 389919138.

The previous prime is 389919113. The next prime is 389919151. The reversal of 389919139 is 931919983.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 389919139 - 2²³ = 381530531 is a prime.

It is not a weakly prime, because it can be changed into another prime (389919109) 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, 194959569 + 194959570.

It is an arithmetic number, because the mean of its divisors is an integer number (194959570).

Almost surely, 2^389919139 is an apocalyptic number.

389919139 is a deficient number, since it is larger than the sum of its proper divisors (1).

389919139 is an equidigital number, since it uses as much as digits as its factorization.

389919139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 472392, while the sum is 52.

The square root of 389919139 is about 19746.3702740529. The cubic root of 389919139 is about 730.5638597216.

The spelling of 389919139 in words is "three hundred eighty-nine million, nine hundred nineteen thousand, one hundred thirty-nine".