634585091 has 16 divisors (see below), whose sum is σ = 736665600. Its totient is φ = 535429440.

The previous prime is 634585069. The next prime is 634585141. The reversal of 634585091 is 190585436.

It is a de Polignac number, because none of the positive numbers 2^k-634585091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634585031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113735 + ... + 119183.

It is an arithmetic number, because the mean of its divisors is an integer number (46041600).

Almost surely, 2^634585091 is an apocalyptic number.

634585091 is a deficient number, since it is larger than the sum of its proper divisors (102080509).

634585091 is a wasteful number, since it uses less digits than its factorization.

634585091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5714.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 634585091 is about 25190.9724107665. The cubic root of 634585091 is about 859.3365583616.

The spelling of 634585091 in words is "six hundred thirty-four million, five hundred eighty-five thousand, ninety-one".