389640563 has 4 divisors (see below), whose sum is σ = 419612928. Its totient is φ = 359668200.

The previous prime is 389640553. The next prime is 389640571. The reversal of 389640563 is 365046983.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 389640563 - 2⁴ = 389640547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389640553) 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 in 3 ways as a sum of consecutive naturals, for example, 14986163 + ... + 14986188.

It is an arithmetic number, because the mean of its divisors is an integer number (104903232).

Almost surely, 2^389640563 is an apocalyptic number.

389640563 is a deficient number, since it is larger than the sum of its proper divisors (29972365).

389640563 is a wasteful number, since it uses less digits than its factorization.

389640563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29972364.

The product of its (nonzero) digits is 466560, while the sum is 44.

The square root of 389640563 is about 19739.3151603595. The cubic root of 389640563 is about 730.3898355680.

The spelling of 389640563 in words is "three hundred eighty-nine million, six hundred forty thousand, five hundred sixty-three".