389739289 has 2 divisors, whose sum is σ = 389739290. Its totient is φ = 389739288.

The previous prime is 389739283. The next prime is 389739299. The reversal of 389739289 is 982937983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 388405264 + 1334025 = 19708^2 + 1155^2 .

It is a cyclic number.

It is not a de Polignac number, because 389739289 - 2³ = 389739281 is a prime.

It is not a weakly prime, because it can be changed into another prime (389739281) 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, 194869644 + 194869645.

It is an arithmetic number, because the mean of its divisors is an integer number (194869645).

Almost surely, 2^389739289 is an apocalyptic number.

It is an amenable number.

389739289 is a deficient number, since it is larger than the sum of its proper divisors (1).

389739289 is an equidigital number, since it uses as much as digits as its factorization.

389739289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 58.

The square root of 389739289 is about 19741.8157472913. The cubic root of 389739289 is about 730.4515183807.

The spelling of 389739289 in words is "three hundred eighty-nine million, seven hundred thirty-nine thousand, two hundred eighty-nine".