230945509 has 2 divisors, whose sum is σ = 230945510. Its totient is φ = 230945508.

The previous prime is 230945471. The next prime is 230945543. The reversal of 230945509 is 905549032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214769025 + 16176484 = 14655^2 + 4022^2 .

It is a cyclic number.

It is not a de Polignac number, because 230945509 - 2⁹ = 230944997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (230945609) 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, 115472754 + 115472755.

It is an arithmetic number, because the mean of its divisors is an integer number (115472755).

Almost surely, 2^230945509 is an apocalyptic number.

It is an amenable number.

230945509 is a deficient number, since it is larger than the sum of its proper divisors (1).

230945509 is an equidigital number, since it uses as much as digits as its factorization.

230945509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 230945509 is about 15196.8914255515. The cubic root of 230945509 is about 613.5309940731.

The spelling of 230945509 in words is "two hundred thirty million, nine hundred forty-five thousand, five hundred nine".