389516923 has 2 divisors, whose sum is σ = 389516924. Its totient is φ = 389516922.

The previous prime is 389516909. The next prime is 389516957. The reversal of 389516923 is 329615983.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 389516923 - 2⁹ = 389516411 is a prime.

It is not a weakly prime, because it can be changed into another prime (389546923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194758461 + 194758462.

It is an arithmetic number, because the mean of its divisors is an integer number (194758462).

Almost surely, 2^389516923 is an apocalyptic number.

389516923 is a deficient number, since it is larger than the sum of its proper divisors (1).

389516923 is an equidigital number, since it uses as much as digits as its factorization.

389516923 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 389516923 is about 19736.1830909626. The cubic root of 389516923 is about 730.3125720921.

The spelling of 389516923 in words is "three hundred eighty-nine million, five hundred sixteen thousand, nine hundred twenty-three".