389945679 has 4 divisors (see below), whose sum is σ = 519927576. Its totient is φ = 259963784.

The previous prime is 389945671. The next prime is 389945719. The reversal of 389945679 is 976549983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 976549983 = 3 ⋅325516661.

It is a cyclic number.

It is not a de Polignac number, because 389945679 - 2³ = 389945671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389945671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64990944 + ... + 64990949.

It is an arithmetic number, because the mean of its divisors is an integer number (129981894).

Almost surely, 2^389945679 is an apocalyptic number.

389945679 is a deficient number, since it is larger than the sum of its proper divisors (129981897).

389945679 is a wasteful number, since it uses less digits than its factorization.

389945679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129981896.

The product of its digits is 14696640, while the sum is 60.

The square root of 389945679 is about 19747.0422848588. The cubic root of 389945679 is about 730.5804347180.

The spelling of 389945679 in words is "three hundred eighty-nine million, nine hundred forty-five thousand, six hundred seventy-nine".