231989935 has 4 divisors (see below), whose sum is σ = 278387928. Its totient is φ = 185591944.

The previous prime is 231989921. The next prime is 231989977. The reversal of 231989935 is 539989132.

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 231989935 - 2⁵ = 231989903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23198989 + ... + 23198998.

It is an arithmetic number, because the mean of its divisors is an integer number (69596982).

Almost surely, 2^231989935 is an apocalyptic number.

231989935 is a deficient number, since it is larger than the sum of its proper divisors (46397993).

231989935 is an equidigital number, since it uses as much as digits as its factorization.

231989935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46397992.

The product of its digits is 524880, while the sum is 49.

The square root of 231989935 is about 15231.2158083326. The cubic root of 231989935 is about 614.4544791268.

It can be divided in two parts, 23198 and 9935, that added together give a palindrome (33133).

The spelling of 231989935 in words is "two hundred thirty-one million, nine hundred eighty-nine thousand, nine hundred thirty-five".