243629563 has 2 divisors, whose sum is σ = 243629564. Its totient is φ = 243629562.

The previous prime is 243629489. The next prime is 243629569. The reversal of 243629563 is 365926342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243629563 - 2⁹ = 243629051 is a prime.

It is not a weakly prime, because it can be changed into another prime (243629569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121814781 + 121814782.

It is an arithmetic number, because the mean of its divisors is an integer number (121814782).

Almost surely, 2^243629563 is an apocalyptic number.

243629563 is a deficient number, since it is larger than the sum of its proper divisors (1).

243629563 is an equidigital number, since it uses as much as digits as its factorization.

243629563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 40.

The square root of 243629563 is about 15608.6374485411. The cubic root of 243629563 is about 624.5635891038.

The spelling of 243629563 in words is "two hundred forty-three million, six hundred twenty-nine thousand, five hundred sixty-three".