635873 has 12 divisors (see below), whose sum is σ = 779760. Its totient is φ = 515592.

The previous prime is 635867. The next prime is 635879. The reversal of 635873 is 378536.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (635867) and next prime (635879).

It is not a de Polignac number, because 635873 - 2⁶ = 635809 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (635879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 590 + ... + 1272.

It is an arithmetic number, because the mean of its divisors is an integer number (64980).

2⁶³⁵⁸⁷³ is an apocalyptic number.

It is an amenable number.

635873 is a deficient number, since it is larger than the sum of its proper divisors (143887).

635873 is a wasteful number, since it uses less digits than its factorization.

635873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716 (or 709 counting only the distinct ones).

The product of its digits is 15120, while the sum is 32.

The square root of 635873 is about 797.4164533040. The cubic root of 635873 is about 85.9917515074.

The spelling of 635873 in words is "six hundred thirty-five thousand, eight hundred seventy-three".