231339089 has 2 divisors, whose sum is σ = 231339090. Its totient is φ = 231339088.

The previous prime is 231338999. The next prime is 231339091. The reversal of 231339089 is 980933132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215854864 + 15484225 = 14692^2 + 3935^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231339089 is a prime.

It is a Sophie Germain prime.

Together with 231339091, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (231332089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115669544 + 115669545.

It is an arithmetic number, because the mean of its divisors is an integer number (115669545).

Almost surely, 2^231339089 is an apocalyptic number.

It is an amenable number.

231339089 is a deficient number, since it is larger than the sum of its proper divisors (1).

231339089 is an equidigital number, since it uses as much as digits as its factorization.

231339089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 231339089 is about 15209.8352719548. The cubic root of 231339089 is about 613.8793251368.

The spelling of 231339089 in words is "two hundred thirty-one million, three hundred thirty-nine thousand, eighty-nine".