634349634 has 16 divisors (see below), whose sum is σ = 1268955072. Its totient is φ = 211407248.

The previous prime is 634349609. The next prime is 634349669. The reversal of 634349634 is 436943436.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40387 + ... + 53849.

It is an arithmetic number, because the mean of its divisors is an integer number (79309692).

Almost surely, 2^634349634 is an apocalyptic number.

634349634 is the 13463-rd nonagonal number.

634349634 is an abundant number, since it is smaller than the sum of its proper divisors (634605438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

634349634 is a wasteful number, since it uses less digits than its factorization.

634349634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21321.

The product of its digits is 559872, while the sum is 42.

The square root of 634349634 is about 25186.2985371015. The cubic root of 634349634 is about 859.2302622209.

The spelling of 634349634 in words is "six hundred thirty-four million, three hundred forty-nine thousand, six hundred thirty-four".