230394509 has 2 divisors, whose sum is σ = 230394510. Its totient is φ = 230394508.

The previous prime is 230394491. The next prime is 230394533. The reversal of 230394509 is 905493032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215355625 + 15038884 = 14675^2 + 3878^2 .

It is a cyclic number.

It is not a de Polignac number, because 230394509 - 2⁸ = 230394253 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (230394599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115197254 + 115197255.

It is an arithmetic number, because the mean of its divisors is an integer number (115197255).

Almost surely, 2^230394509 is an apocalyptic number.

It is an amenable number.

230394509 is a deficient number, since it is larger than the sum of its proper divisors (1).

230394509 is an equidigital number, since it uses as much as digits as its factorization.

230394509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 230394509 is about 15178.7518920364. The cubic root of 230394509 is about 613.0426757314.

The spelling of 230394509 in words is "two hundred thirty million, three hundred ninety-four thousand, five hundred nine".