634447953 has 12 divisors (see below), whose sum is σ = 945987328. Its totient is φ = 409321080.

The previous prime is 634447949. The next prime is 634447969. The reversal of 634447953 is 359744436.

634447953 is a `hidden beast` number, since 634 + 4 + 4 + 7 + 9 + 5 + 3 = 666.

It is not a de Polignac number, because 634447953 - 2² = 634447949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 634447899 and 634447908.

It is not an unprimeable number, because it can be changed into a prime (634447903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1136725 + ... + 1137282.

Almost surely, 2^634447953 is an apocalyptic number.

It is an amenable number.

634447953 is a deficient number, since it is larger than the sum of its proper divisors (311539375).

634447953 is a wasteful number, since it uses less digits than its factorization.

634447953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2274044 (or 2274041 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 45.

The square root of 634447953 is about 25188.2502965172. The cubic root of 634447953 is about 859.2746511465.

The spelling of 634447953 in words is "six hundred thirty-four million, four hundred forty-seven thousand, nine hundred fifty-three".