634920635 has 32 divisors (see below), whose sum is σ = 836196480. Its totient is φ = 461260800.

The previous prime is 634920631. The next prime is 634920647. The reversal of 634920635 is 536029436.

It is not a de Polignac number, because 634920635 - 2² = 634920631 is a prime.

It is not an unprimeable number, because it can be changed into a prime (634920631) 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 31 ways as a sum of consecutive naturals, for example, 201875 + ... + 204995.

It is an arithmetic number, because the mean of its divisors is an integer number (26131140).

Almost surely, 2^634920635 is an apocalyptic number.

634920635 is a deficient number, since it is larger than the sum of its proper divisors (201275845).

634920635 is a wasteful number, since it uses less digits than its factorization.

634920635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3239.

The product of its (nonzero) digits is 116640, while the sum is 38.

The square root of 634920635 is about 25197.6315355233. The cubic root of 634920635 is about 859.4879929620.

The spelling of 634920635 in words is "six hundred thirty-four million, nine hundred twenty thousand, six hundred thirty-five".