389813 has 4 divisors (see below), whose sum is σ = 396480. Its totient is φ = 383148.

The previous prime is 389797. The next prime is 389819. The reversal of 389813 is 318983.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 318983 = 7 ⋅45569.

It is a cyclic number.

It is not a de Polignac number, because 389813 - 2⁴ = 389797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 389813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3245 + ... + 3362.

It is an arithmetic number, because the mean of its divisors is an integer number (99120).

2³⁸⁹⁸¹³ is an apocalyptic number.

It is an amenable number.

389813 is a deficient number, since it is larger than the sum of its proper divisors (6667).

389813 is an equidigital number, since it uses as much as digits as its factorization.

389813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6666.

The product of its digits is 5184, while the sum is 32.

The square root of 389813 is about 624.3500620645. The cubic root of 389813 is about 73.0497565332.

The spelling of 389813 in words is "three hundred eighty-nine thousand, eight hundred thirteen".