723668 has 12 divisors (see below), whose sum is σ = 1381632. Its totient is φ = 328920.

The previous prime is 723661. The next prime is 723721. The reversal of 723668 is 866327.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723661) 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, 8180 + ... + 8267.

It is an arithmetic number, because the mean of its divisors is an integer number (115136).

2⁷²³⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

723668 is a deficient number, since it is larger than the sum of its proper divisors (657964).

723668 is a wasteful number, since it uses less digits than its factorization.

723668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16462 (or 16460 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 723668 is about 850.6867813714. The cubic root of 723668 is about 89.7800389824.

The spelling of 723668 in words is "seven hundred twenty-three thousand, six hundred sixty-eight".