389679 has 4 divisors (see below), whose sum is σ = 519576. Its totient is φ = 259784.

The previous prime is 389663. The next prime is 389687. The reversal of 389679 is 976983.

It is a happy number.

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 389679 - 2⁴ = 389663 is a prime.

It is an Ulam number.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 389679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389629) 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, 64944 + ... + 64949.

It is an arithmetic number, because the mean of its divisors is an integer number (129894).

2³⁸⁹⁶⁷⁹ is an apocalyptic number.

389679 is a deficient number, since it is larger than the sum of its proper divisors (129897).

389679 is a wasteful number, since it uses less digits than its factorization.

389679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129896.

The product of its digits is 81648, while the sum is 42.

The square root of 389679 is about 624.2427412473. The cubic root of 389679 is about 73.0413851780.

It can be divided in two parts, 38967 and 9, that multiplied together give a triangular number (350703 = T₈₃₇).

The spelling of 389679 in words is "three hundred eighty-nine thousand, six hundred seventy-nine".