634873 has 4 divisors (see below), whose sum is σ = 640000. Its totient is φ = 629748.

The previous prime is 634871. The next prime is 634891. The reversal of 634873 is 378436.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 634873 - 2¹ = 634871 is a prime.

It is a super-2 number, since 2×634873² = 806127452258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634871) 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, 2373 + ... + 2626.

It is an arithmetic number, because the mean of its divisors is an integer number (160000).

2⁶³⁴⁸⁷³ is an apocalyptic number.

It is an amenable number.

634873 is a deficient number, since it is larger than the sum of its proper divisors (5127).

634873 is a wasteful number, since it uses less digits than its factorization.

634873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5126.

The product of its digits is 12096, while the sum is 31.

The square root of 634873 is about 796.7891816535. The cubic root of 634873 is about 85.9466498026.

The spelling of 634873 in words is "six hundred thirty-four thousand, eight hundred seventy-three".