634689574 has 4 divisors (see below), whose sum is σ = 952034364. Its totient is φ = 317344786.

The previous prime is 634689557. The next prime is 634689581. The reversal of 634689574 is 475986436.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 158672392 + ... + 158672395.

It is an arithmetic number, because the mean of its divisors is an integer number (238008591).

Almost surely, 2^634689574 is an apocalyptic number.

634689574 is a deficient number, since it is larger than the sum of its proper divisors (317344790).

634689574 is a wasteful number, since it uses less digits than its factorization.

634689574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317344789.

The product of its digits is 4354560, while the sum is 52.

The square root of 634689574 is about 25193.0461437278. The cubic root of 634689574 is about 859.3837183803.

The spelling of 634689574 in words is "six hundred thirty-four million, six hundred eighty-nine thousand, five hundred seventy-four".