243630433 has 2 divisors, whose sum is σ = 243630434. Its totient is φ = 243630432.

The previous prime is 243630427. The next prime is 243630449. The reversal of 243630433 is 334036342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 243578449 + 51984 = 15607^2 + 228^2 .

It is a cyclic number.

It is not a de Polignac number, because 243630433 - 2²⁵ = 210076001 is a prime.

It is not a weakly prime, because it can be changed into another prime (243630463) 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 as a sum of consecutive naturals, namely, 121815216 + 121815217.

It is an arithmetic number, because the mean of its divisors is an integer number (121815217).

Almost surely, 2^243630433 is an apocalyptic number.

It is an amenable number.

243630433 is a deficient number, since it is larger than the sum of its proper divisors (1).

243630433 is an equidigital number, since it uses as much as digits as its factorization.

243630433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 28.

The square root of 243630433 is about 15608.6653177009. The cubic root of 243630433 is about 624.5643325407.

Adding to 243630433 its reverse (334036342), we get a palindrome (577666775).

The spelling of 243630433 in words is "two hundred forty-three million, six hundred thirty thousand, four hundred thirty-three".