389863 has 4 divisors (see below), whose sum is σ = 392040. Its totient is φ = 387688.

The previous prime is 389849. The next prime is 389867. The reversal of 389863 is 368983.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 368983 = 43 ⋅8581.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 793 + ... + 1186.

It is an arithmetic number, because the mean of its divisors is an integer number (98010).

2³⁸⁹⁸⁶³ is an apocalyptic number.

389863 is a deficient number, since it is larger than the sum of its proper divisors (2177).

389863 is a wasteful number, since it uses less digits than its factorization.

389863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2176.

The product of its digits is 31104, while the sum is 37.

The square root of 389863 is about 624.3901024200. The cubic root of 389863 is about 73.0528796817.

The spelling of 389863 in words is "three hundred eighty-nine thousand, eight hundred sixty-three".