634959 has 28 divisors (see below), whose sum is σ = 1040536. Its totient is φ = 384912.

The previous prime is 634943. The next prime is 634969. The reversal of 634959 is 959436.

634959 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 634959 - 2⁴ = 634943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634939) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 9444 + ... + 9510.

It is an arithmetic number, because the mean of its divisors is an integer number (37162).

2⁶³⁴⁹⁵⁹ is an apocalyptic number.

634959 is a deficient number, since it is larger than the sum of its proper divisors (405577).

634959 is an equidigital number, since it uses as much as digits as its factorization.

634959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98 (or 83 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 634959 is about 796.8431464222. The cubic root of 634959 is about 85.9505304098.

It can be divided in two parts, 63495 and 9, that added together give a square (63504 = 252²).

The spelling of 634959 in words is "six hundred thirty-four thousand, nine hundred fifty-nine".