231267089 has 2 divisors, whose sum is σ = 231267090. Its totient is φ = 231267088.

The previous prime is 231267067. The next prime is 231267103. The reversal of 231267089 is 980762132.

231267089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225240064 + 6027025 = 15008^2 + 2455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231267089 is a prime.

It is not a weakly prime, because it can be changed into another prime (231267389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115633544 + 115633545.

It is an arithmetic number, because the mean of its divisors is an integer number (115633545).

Almost surely, 2^231267089 is an apocalyptic number.

It is an amenable number.

231267089 is a deficient number, since it is larger than the sum of its proper divisors (1).

231267089 is an equidigital number, since it uses as much as digits as its factorization.

231267089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 231267089 is about 15207.4681982242. The cubic root of 231267089 is about 613.8156323445.

The spelling of 231267089 in words is "two hundred thirty-one million, two hundred sixty-seven thousand, eighty-nine".