243350409 has 4 divisors (see below), whose sum is σ = 324467216. Its totient is φ = 162233604.

The previous prime is 243350407. The next prime is 243350417. The reversal of 243350409 is 904053342.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 243350409 - 2¹ = 243350407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243350407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40558399 + ... + 40558404.

It is an arithmetic number, because the mean of its divisors is an integer number (81116804).

Almost surely, 2^243350409 is an apocalyptic number.

It is an amenable number.

243350409 is a deficient number, since it is larger than the sum of its proper divisors (81116807).

243350409 is an equidigital number, since it uses as much as digits as its factorization.

243350409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81116806.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 243350409 is about 15599.6925931250. The cubic root of 243350409 is about 624.3249535087.

The spelling of 243350409 in words is "two hundred forty-three million, three hundred fifty thousand, four hundred nine".