634113563 has 2 divisors, whose sum is σ = 634113564. Its totient is φ = 634113562.

The previous prime is 634113523. The next prime is 634113577. The reversal of 634113563 is 365311436.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 634113563 - 2⁶ = 634113499 is a prime.

It is not a weakly prime, because it can be changed into another prime (634113523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317056781 + 317056782.

It is an arithmetic number, because the mean of its divisors is an integer number (317056782).

Almost surely, 2^634113563 is an apocalyptic number.

634113563 is a deficient number, since it is larger than the sum of its proper divisors (1).

634113563 is an equidigital number, since it uses as much as digits as its factorization.

634113563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 32.

The square root of 634113563 is about 25181.6116045022. The cubic root of 634113563 is about 859.1236624829.

Adding to 634113563 its reverse (365311436), we get a palindrome (999424999).

The spelling of 634113563 in words is "six hundred thirty-four million, one hundred thirteen thousand, five hundred sixty-three".