389666547 has 12 divisors (see below), whose sum is σ = 573472224. Its totient is φ = 254875920.

The previous prime is 389666539. The next prime is 389666561. The reversal of 389666547 is 745666983.

It is not a de Polignac number, because 389666547 - 2³ = 389666539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 389666493 and 389666502.

It is not an unprimeable number, because it can be changed into a prime (389666047) 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 in 11 ways as a sum of consecutive naturals, for example, 407979 + ... + 408932.

It is an arithmetic number, because the mean of its divisors is an integer number (47789352).

Almost surely, 2^389666547 is an apocalyptic number.

389666547 is a deficient number, since it is larger than the sum of its proper divisors (183805677).

389666547 is a wasteful number, since it uses less digits than its factorization.

389666547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816970 (or 816967 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 54.

The square root of 389666547 is about 19739.9733282495. The cubic root of 389666547 is about 730.4060710676.

The spelling of 389666547 in words is "three hundred eighty-nine million, six hundred sixty-six thousand, five hundred forty-seven".