634723 has 8 divisors (see below), whose sum is σ = 673200. Its totient is φ = 597408.

The previous prime is 634717. The next prime is 634727. The reversal of 634723 is 327436.

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 634723 - 2⁹ = 634211 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 993 + ... + 1501.

It is an arithmetic number, because the mean of its divisors is an integer number (84150).

2⁶³⁴⁷²³ is an apocalyptic number.

634723 is a deficient number, since it is larger than the sum of its proper divisors (38477).

634723 is a wasteful number, since it uses less digits than its factorization.

634723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581.

The product of its digits is 3024, while the sum is 25.

The square root of 634723 is about 796.6950483089. The cubic root of 634723 is about 85.9398804630.

The spelling of 634723 in words is "six hundred thirty-four thousand, seven hundred twenty-three".