635697 has 24 divisors (see below), whose sum is σ = 995904. Its totient is φ = 389664.

The previous prime is 635689. The next prime is 635707. The reversal of 635697 is 796536.

It is a happy number.

635697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 635697 - 2³ = 635689 is a prime.

It is a super-2 number, since 2×635697² = 808221351618, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (635617) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7618 + ... + 7700.

It is an arithmetic number, because the mean of its divisors is an integer number (41496).

2⁶³⁵⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

635697 is a deficient number, since it is larger than the sum of its proper divisors (360207).

635697 is a wasteful number, since it uses less digits than its factorization.

635697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 146 counting only the distinct ones).

The product of its digits is 34020, while the sum is 36.

The square root of 635697 is about 797.3060892781. The cubic root of 635697 is about 85.9838170379.

The spelling of 635697 in words is "six hundred thirty-five thousand, six hundred ninety-seven".