389612539 has 2 divisors, whose sum is σ = 389612540. Its totient is φ = 389612538.

The previous prime is 389612527. The next prime is 389612567. The reversal of 389612539 is 935216983.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (935216983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 389612539 - 2⁵ = 389612507 is a prime.

It is not a weakly prime, because it can be changed into another prime (389612599) 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, 194806269 + 194806270.

It is an arithmetic number, because the mean of its divisors is an integer number (194806270).

Almost surely, 2^389612539 is an apocalyptic number.

389612539 is a deficient number, since it is larger than the sum of its proper divisors (1).

389612539 is an equidigital number, since it uses as much as digits as its factorization.

389612539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 46.

The square root of 389612539 is about 19738.6052952077. The cubic root of 389612539 is about 730.3723246127.

The spelling of 389612539 in words is "three hundred eighty-nine million, six hundred twelve thousand, five hundred thirty-nine".