634394 has 4 divisors (see below), whose sum is σ = 951594. Its totient is φ = 317196.

The previous prime is 634373. The next prime is 634397. The reversal of 634394 is 493436.

It is a happy number.

634394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 508369 + 126025 = 713^2 + 355^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (634397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158597 + ... + 158600.

2⁶³⁴³⁹⁴ is an apocalyptic number.

634394 is a deficient number, since it is larger than the sum of its proper divisors (317200).

634394 is a wasteful number, since it uses less digits than its factorization.

634394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317199.

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

The square root of 634394 is about 796.4885435460. The cubic root of 634394 is about 85.9250293089.

The spelling of 634394 in words is "six hundred thirty-four thousand, three hundred ninety-four".