231634289 has 2 divisors, whose sum is σ = 231634290. Its totient is φ = 231634288.

The previous prime is 231634279. The next prime is 231634307. The reversal of 231634289 is 982436132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213656689 + 17977600 = 14617^2 + 4240^2 .

It is a cyclic number.

It is not a de Polignac number, because 231634289 - 2⁸ = 231634033 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231634229) 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, 115817144 + 115817145.

It is an arithmetic number, because the mean of its divisors is an integer number (115817145).

Almost surely, 2^231634289 is an apocalyptic number.

It is an amenable number.

231634289 is a deficient number, since it is larger than the sum of its proper divisors (1).

231634289 is an equidigital number, since it uses as much as digits as its factorization.

231634289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 38.

The square root of 231634289 is about 15219.5364252660. The cubic root of 231634289 is about 614.1403275056.

The spelling of 231634289 in words is "two hundred thirty-one million, six hundred thirty-four thousand, two hundred eighty-nine".