243320099 has 16 divisors (see below), whose sum is σ = 295850880. Its totient is φ = 197228160.

The previous prime is 243320027. The next prime is 243320113. The reversal of 243320099 is 990023342.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243320099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243320599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30689 + ... + 37794.

It is an arithmetic number, because the mean of its divisors is an integer number (18490680).

Almost surely, 2^243320099 is an apocalyptic number.

243320099 is a deficient number, since it is larger than the sum of its proper divisors (52530781).

243320099 is a wasteful number, since it uses less digits than its factorization.

243320099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68530.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 243320099 is about 15598.7210693698. The cubic root of 243320099 is about 624.2990319373.

The spelling of 243320099 in words is "two hundred forty-three million, three hundred twenty thousand, ninety-nine".