634439 has 8 divisors (see below), whose sum is σ = 702240. Its totient is φ = 569376.

The previous prime is 634421. The next prime is 634441. The reversal of 634439 is 934436.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 634439 - 2¹⁶ = 568903 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 6⁷ + 3¹¹ + 4³ + 4³ + 3¹¹ + 9² .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634499) 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 7 ways as a sum of consecutive naturals, for example, 179 + ... + 1140.

It is an arithmetic number, because the mean of its divisors is an integer number (87780).

2⁶³⁴⁴³⁹ is an apocalyptic number.

634439 is a deficient number, since it is larger than the sum of its proper divisors (67801).

634439 is a wasteful number, since it uses less digits than its factorization.

634439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369.

The product of its digits is 7776, while the sum is 29.

The square root of 634439 is about 796.5167920389. The cubic root of 634439 is about 85.9270609248.

The spelling of 634439 in words is "six hundred thirty-four thousand, four hundred thirty-nine".