723818 has 4 divisors (see below), whose sum is σ = 1085730. Its totient is φ = 361908.

The previous prime is 723803. The next prime is 723823. The reversal of 723818 is 818327.

723818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 693889 + 29929 = 833^2 + 173^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180953 + ... + 180956.

2⁷²³⁸¹⁸ is an apocalyptic number.

723818 is a deficient number, since it is larger than the sum of its proper divisors (361912).

723818 is a wasteful number, since it uses less digits than its factorization.

723818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361911.

The product of its digits is 2688, while the sum is 29.

The square root of 723818 is about 850.7749408627. The cubic root of 723818 is about 89.7862416774.

The spelling of 723818 in words is "seven hundred twenty-three thousand, eight hundred eighteen".