243998933 has 2 divisors, whose sum is σ = 243998934. Its totient is φ = 243998932.

The previous prime is 243998903. The next prime is 243998947. The reversal of 243998933 is 339899342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208022929 + 35976004 = 14423^2 + 5998^2 .

It is a cyclic number.

It is not a de Polignac number, because 243998933 - 2⁶ = 243998869 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243998903) 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 as a sum of consecutive naturals, namely, 121999466 + 121999467.

It is an arithmetic number, because the mean of its divisors is an integer number (121999467).

Almost surely, 2^243998933 is an apocalyptic number.

It is an amenable number.

243998933 is a deficient number, since it is larger than the sum of its proper divisors (1).

243998933 is an equidigital number, since it uses as much as digits as its factorization.

243998933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1259712, while the sum is 50.

The square root of 243998933 is about 15620.4651979382. The cubic root of 243998933 is about 624.8790660948.

The spelling of 243998933 in words is "two hundred forty-three million, nine hundred ninety-eight thousand, nine hundred thirty-three".