230443309 has 4 divisors (see below), whose sum is σ = 238389660. Its totient is φ = 222496960.

The previous prime is 230443259. The next prime is 230443349. The reversal of 230443309 is 903344032.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 170380809 + 60062500 = 13053^2 + 7750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-230443309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230443349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3973132 + ... + 3973189.

It is an arithmetic number, because the mean of its divisors is an integer number (59597415).

Almost surely, 2^230443309 is an apocalyptic number.

230443309 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

230443309 is a deficient number, since it is larger than the sum of its proper divisors (7946351).

230443309 is an equidigital number, since it uses as much as digits as its factorization.

230443309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7946350.

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 230443309 is about 15180.3593172230. The cubic root of 230443309 is about 613.0859556555.

The spelling of 230443309 in words is "two hundred thirty million, four hundred forty-three thousand, three hundred nine".