634771 has 4 divisors (see below), whose sum is σ = 668200. Its totient is φ = 601344.

The previous prime is 634759. The next prime is 634793. The reversal of 634771 is 177436.

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 634771 - 2⁷ = 634643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634741) 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, 16686 + ... + 16723.

It is an arithmetic number, because the mean of its divisors is an integer number (167050).

2⁶³⁴⁷⁷¹ is an apocalyptic number.

634771 is a deficient number, since it is larger than the sum of its proper divisors (33429).

634771 is a wasteful number, since it uses less digits than its factorization.

634771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33428.

The product of its digits is 3528, while the sum is 28.

The square root of 634771 is about 796.7251721893. The cubic root of 634771 is about 85.9420467677.

The spelling of 634771 in words is "six hundred thirty-four thousand, seven hundred seventy-one".