389879 has 4 divisors (see below), whose sum is σ = 445584. Its totient is φ = 334176.

The previous prime is 389867. The next prime is 389891. The reversal of 389879 is 978983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 978983 = 37 ⋅26459.

It is an interprime number because it is at equal distance from previous prime (389867) and next prime (389891).

It is a cyclic number.

It is not a de Polignac number, because 389879 - 2¹² = 385783 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 (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, 27842 + ... + 27855.

It is an arithmetic number, because the mean of its divisors is an integer number (111396).

2³⁸⁹⁸⁷⁹ is an apocalyptic number.

389879 is a deficient number, since it is larger than the sum of its proper divisors (55705).

389879 is an equidigital number, since it uses as much as digits as its factorization.

389879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55704.

The product of its digits is 108864, while the sum is 44.

The square root of 389879 is about 624.4029147914. The cubic root of 389879 is about 73.0538790328.

The spelling of 389879 in words is "three hundred eighty-nine thousand, eight hundred seventy-nine".