634111171 has 2 divisors, whose sum is σ = 634111172. Its totient is φ = 634111170.

The previous prime is 634111151. The next prime is 634111193. The reversal of 634111171 is 171111436.

634111171 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634111171 is a prime.

It is not a weakly prime, because it can be changed into another prime (634111141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317055585 + 317055586.

It is an arithmetic number, because the mean of its divisors is an integer number (317055586).

Almost surely, 2^634111171 is an apocalyptic number.

634111171 is a deficient number, since it is larger than the sum of its proper divisors (1).

634111171 is an equidigital number, since it uses as much as digits as its factorization.

634111171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 25.

The square root of 634111171 is about 25181.5641094830. The cubic root of 634111171 is about 859.1225822209.

The spelling of 634111171 in words is "six hundred thirty-four million, one hundred eleven thousand, one hundred seventy-one".