230307509 has 2 divisors, whose sum is σ = 230307510. Its totient is φ = 230307508.

The previous prime is 230307443. The next prime is 230307521. The reversal of 230307509 is 905703032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151044100 + 79263409 = 12290^2 + 8903^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-230307509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (230307709) 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, 115153754 + 115153755.

It is an arithmetic number, because the mean of its divisors is an integer number (115153755).

Almost surely, 2^230307509 is an apocalyptic number.

It is an amenable number.

230307509 is a deficient number, since it is larger than the sum of its proper divisors (1).

230307509 is an equidigital number, since it uses as much as digits as its factorization.

230307509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5670, while the sum is 29.

The square root of 230307509 is about 15175.8857731600. The cubic root of 230307509 is about 612.9655016880.

The spelling of 230307509 in words is "two hundred thirty million, three hundred seven thousand, five hundred nine".