231767089 has 2 divisors, whose sum is σ = 231767090. Its totient is φ = 231767088.

The previous prime is 231767083. The next prime is 231767099. The reversal of 231767089 is 980767132.

It is a happy number.

231767089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 230796864 + 970225 = 15192^2 + 985^2 .

It is a cyclic number.

It is not a de Polignac number, because 231767089 - 2⁵ = 231767057 is a prime.

It is not a weakly prime, because it can be changed into another prime (231767083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115883544 + 115883545.

It is an arithmetic number, because the mean of its divisors is an integer number (115883545).

Almost surely, 2^231767089 is an apocalyptic number.

It is an amenable number.

231767089 is a deficient number, since it is larger than the sum of its proper divisors (1).

231767089 is an equidigital number, since it uses as much as digits as its factorization.

231767089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 231767089 is about 15223.8986136929. The cubic root of 231767089 is about 614.2576708901.

Adding to 231767089 its sum of digits (43), we get a palindrome (231767132).

The spelling of 231767089 in words is "two hundred thirty-one million, seven hundred sixty-seven thousand, eighty-nine".