389132779 has 4 divisors (see below), whose sum is σ = 444723184. Its totient is φ = 333542376.

The previous prime is 389132773. The next prime is 389132797. The reversal of 389132779 is 977231983.

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 389132779 - 2⁵ = 389132747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389132773) 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, 27795192 + ... + 27795205.

It is an arithmetic number, because the mean of its divisors is an integer number (111180796).

Almost surely, 2^389132779 is an apocalyptic number.

389132779 is a deficient number, since it is larger than the sum of its proper divisors (55590405).

389132779 is an equidigital number, since it uses as much as digits as its factorization.

389132779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55590404.

The product of its digits is 571536, while the sum is 49.

The square root of 389132779 is about 19726.4487173946. The cubic root of 389132779 is about 730.0724135334.

The spelling of 389132779 in words is "three hundred eighty-nine million, one hundred thirty-two thousand, seven hundred seventy-nine".