231773089 has 2 divisors, whose sum is σ = 231773090. Its totient is φ = 231773088.

The previous prime is 231772993. The next prime is 231773119. The reversal of 231773089 is 980377132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219276864 + 12496225 = 14808^2 + 3535^2 .

It is a cyclic number.

It is not a de Polignac number, because 231773089 - 2²⁷ = 97555361 is a prime.

It is not a weakly prime, because it can be changed into another prime (231779089) 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 as a sum of consecutive naturals, namely, 115886544 + 115886545.

It is an arithmetic number, because the mean of its divisors is an integer number (115886545).

Almost surely, 2^231773089 is an apocalyptic number.

It is an amenable number.

231773089 is a deficient number, since it is larger than the sum of its proper divisors (1).

231773089 is an equidigital number, since it uses as much as digits as its factorization.

231773089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 231773089 is about 15224.0956710079. The cubic root of 231773089 is about 614.2629714905.

The spelling of 231773089 in words is "two hundred thirty-one million, seven hundred seventy-three thousand, eighty-nine".