634389 has 16 divisors (see below), whose sum is σ = 1024128. Its totient is φ = 340992.

The previous prime is 634373. The next prime is 634397. The reversal of 634389 is 983436.

634389 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 634389 - 2⁴ = 634373 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (632389) 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, 532 + ... + 1245.

It is an arithmetic number, because the mean of its divisors is an integer number (64008).

2⁶³⁴³⁸⁹ is an apocalyptic number.

It is an amenable number.

634389 is a deficient number, since it is larger than the sum of its proper divisors (389739).

634389 is a wasteful number, since it uses less digits than its factorization.

634389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804.

The product of its digits is 15552, while the sum is 33.

The square root of 634389 is about 796.4854047627. The cubic root of 634389 is about 85.9248035678.

The spelling of 634389 in words is "six hundred thirty-four thousand, three hundred eighty-nine".