389979231 has 8 divisors (see below), whose sum is σ = 521463600. Its totient is φ = 259240512.

The previous prime is 389979229. The next prime is 389979241. The reversal of 389979231 is 132979983.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 389979231 - 2¹ = 389979229 is a prime.

It is a super-2 number, since 2×389979231² = 304167601222702722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389979241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185190 + ... + 187283.

It is an arithmetic number, because the mean of its divisors is an integer number (65182950).

Almost surely, 2^389979231 is an apocalyptic number.

389979231 is a deficient number, since it is larger than the sum of its proper divisors (131484369).

389979231 is a wasteful number, since it uses less digits than its factorization.

389979231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372825.

The product of its digits is 734832, while the sum is 51.

The square root of 389979231 is about 19747.8918115327. The cubic root of 389979231 is about 730.6013878345.

The spelling of 389979231 in words is "three hundred eighty-nine million, nine hundred seventy-nine thousand, two hundred thirty-one".