634579 has 4 divisors (see below), whose sum is σ = 692280. Its totient is φ = 576880.

The previous prime is 634577. The next prime is 634597. The reversal of 634579 is 975436.

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

It is a cyclic number.

It is not a de Polignac number, because 634579 - 2¹ = 634577 is a prime.

It is a Duffinian number.

634579 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (634573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28834 + ... + 28855.

It is an arithmetic number, because the mean of its divisors is an integer number (173070).

2⁶³⁴⁵⁷⁹ is an apocalyptic number.

634579 is a deficient number, since it is larger than the sum of its proper divisors (57701).

634579 is a wasteful number, since it uses less digits than its factorization.

634579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57700.

The product of its digits is 22680, while the sum is 34.

The square root of 634579 is about 796.6046698332. The cubic root of 634579 is about 85.9333808935.

The spelling of 634579 in words is "six hundred thirty-four thousand, five hundred seventy-nine".