243328387 has 2 divisors, whose sum is σ = 243328388. Its totient is φ = 243328386.

The previous prime is 243328373. The next prime is 243328411. The reversal of 243328387 is 783823342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243328387 - 2¹⁹ = 242804099 is a prime.

It is not a weakly prime, because it can be changed into another prime (243328367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121664193 + 121664194.

It is an arithmetic number, because the mean of its divisors is an integer number (121664194).

Almost surely, 2^243328387 is an apocalyptic number.

243328387 is a deficient number, since it is larger than the sum of its proper divisors (1).

243328387 is an equidigital number, since it uses as much as digits as its factorization.

243328387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 40.

The square root of 243328387 is about 15598.9867299129. The cubic root of 243328387 is about 624.3061201743.

The spelling of 243328387 in words is "two hundred forty-three million, three hundred twenty-eight thousand, three hundred eighty-seven".