231839889 has 8 divisors (see below), whose sum is σ = 309751392. Its totient is φ = 154244160.

The previous prime is 231839887. The next prime is 231839903. The reversal of 231839889 is 988938132.

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

It is not a de Polignac number, because 231839889 - 2¹ = 231839887 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231839887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77224 + ... + 80169.

It is an arithmetic number, because the mean of its divisors is an integer number (38718924).

Almost surely, 2^231839889 is an apocalyptic number.

It is an amenable number.

231839889 is a deficient number, since it is larger than the sum of its proper divisors (77911503).

231839889 is a wasteful number, since it uses less digits than its factorization.

231839889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157887.

The product of its digits is 746496, while the sum is 51.

The square root of 231839889 is about 15226.2894035284. The cubic root of 231839889 is about 614.3219786647.

The spelling of 231839889 in words is "two hundred thirty-one million, eight hundred thirty-nine thousand, eight hundred eighty-nine".