634688475 has 24 divisors (see below), whose sum is σ = 1050200640. Its totient is φ = 338226720.

The previous prime is 634688443. The next prime is 634688477. The reversal of 634688475 is 574886436.

It is not a de Polignac number, because 634688475 - 2⁵ = 634688443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (634688477) 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 in 23 ways as a sum of consecutive naturals, for example, 118812 + ... + 124038.

It is an arithmetic number, because the mean of its divisors is an integer number (43758360).

Almost surely, 2^634688475 is an apocalyptic number.

634688475 is a deficient number, since it is larger than the sum of its proper divisors (415512165).

634688475 is a wasteful number, since it uses less digits than its factorization.

634688475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6859 (or 6854 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 51.

The square root of 634688475 is about 25193.0243321440. The cubic root of 634688475 is about 859.3832223566.

The spelling of 634688475 in words is "six hundred thirty-four million, six hundred eighty-eight thousand, four hundred seventy-five".