634368641 has 2 divisors, whose sum is σ = 634368642. Its totient is φ = 634368640.

The previous prime is 634368629. The next prime is 634368673. The reversal of 634368641 is 146863436.

634368641 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 can be written as a sum of positive squares in only one way, i.e., 594628225 + 39740416 = 24385^2 + 6304^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634368641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (634368611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317184320 + 317184321.

It is an arithmetic number, because the mean of its divisors is an integer number (317184321).

Almost surely, 2^634368641 is an apocalyptic number.

It is an amenable number.

634368641 is a deficient number, since it is larger than the sum of its proper divisors (1).

634368641 is an equidigital number, since it uses as much as digits as its factorization.

634368641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 41.

The square root of 634368641 is about 25186.6758624476. The cubic root of 634368641 is about 859.2388438325.

The spelling of 634368641 in words is "six hundred thirty-four million, three hundred sixty-eight thousand, six hundred forty-one".