389684879 has 2 divisors, whose sum is σ = 389684880. Its totient is φ = 389684878.

The previous prime is 389684873. The next prime is 389684891. The reversal of 389684879 is 978486983.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 389684879 - 2¹⁶ = 389619343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389684873) 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 as a sum of consecutive naturals, namely, 194842439 + 194842440.

It is an arithmetic number, because the mean of its divisors is an integer number (194842440).

Almost surely, 2^389684879 is an apocalyptic number.

389684879 is a deficient number, since it is larger than the sum of its proper divisors (1).

389684879 is an equidigital number, since it uses as much as digits as its factorization.

389684879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20901888, while the sum is 62.

The square root of 389684879 is about 19740.4376597886. The cubic root of 389684879 is about 730.4175249583.

The spelling of 389684879 in words is "three hundred eighty-nine million, six hundred eighty-four thousand, eight hundred seventy-nine".