634823 has 8 divisors (see below), whose sum is σ = 757248. Its totient is φ = 520344.

The previous prime is 634817. The next prime is 634841. The reversal of 634823 is 328436.

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 634823 - 2⁴ = 634807 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 634792 and 634801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1811 + ... + 2132.

It is an arithmetic number, because the mean of its divisors is an integer number (94656).

2⁶³⁴⁸²³ is an apocalyptic number.

634823 is a deficient number, since it is larger than the sum of its proper divisors (122425).

634823 is a wasteful number, since it uses less digits than its factorization.

634823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3973.

The product of its digits is 3456, while the sum is 26.

The square root of 634823 is about 796.7578051077. The cubic root of 634823 is about 85.9443934746.

The spelling of 634823 in words is "six hundred thirty-four thousand, eight hundred twenty-three".