634944897 has 6 divisors (see below), whose sum is σ = 917142642. Its totient is φ = 423296592.

The previous prime is 634944889. The next prime is 634944899. The reversal of 634944897 is 798449436.

It is a happy number.

634944897 is a `hidden beast` number, since 63 + 494 + 4 + 8 + 97 = 666.

634944897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 493239681 + 141705216 = 22209^2 + 11904^2 .

It is not a de Polignac number, because 634944897 - 2³ = 634944889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (634944899) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35274708 + ... + 35274725.

It is an arithmetic number, because the mean of its divisors is an integer number (152857107).

Almost surely, 2^634944897 is an apocalyptic number.

It is an amenable number.

634944897 is a deficient number, since it is larger than the sum of its proper divisors (282197745).

634944897 is a wasteful number, since it uses less digits than its factorization.

634944897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70549439 (or 70549436 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The square root of 634944897 is about 25198.1129650615. The cubic root of 634944897 is about 859.4989405938.

The spelling of 634944897 in words is "six hundred thirty-four million, nine hundred forty-four thousand, eight hundred ninety-seven".