389779 has 4 divisors (see below), whose sum is σ = 419776. Its totient is φ = 359784.

The previous prime is 389773. The next prime is 389783. The reversal of 389779 is 977983.

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 389779 - 2⁷ = 389651 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14979 + ... + 15004.

It is an arithmetic number, because the mean of its divisors is an integer number (104944).

2³⁸⁹⁷⁷⁹ is an apocalyptic number.

389779 is a deficient number, since it is larger than the sum of its proper divisors (29997).

389779 is a wasteful number, since it uses less digits than its factorization.

389779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29996.

The product of its digits is 95256, while the sum is 43.

The square root of 389779 is about 624.3228331561. The cubic root of 389779 is about 73.0476326396.

It can be divided in two parts, 389 and 779, that multiplied together give a triangular number (303031 = T₇₇₈).

The spelling of 389779 in words is "three hundred eighty-nine thousand, seven hundred seventy-nine".