723663 has 6 divisors (see below), whose sum is σ = 1045304. Its totient is φ = 482436.

The previous prime is 723661. The next prime is 723721. The reversal of 723663 is 366327.

723663 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 723663 - 2¹ = 723661 is a prime.

It is a Duffinian number.

723663 is strictly pandigital in base 7.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40195 + ... + 40212.

2⁷²³⁶⁶³ is an apocalyptic number.

723663 is a deficient number, since it is larger than the sum of its proper divisors (321641).

723663 is a wasteful number, since it uses less digits than its factorization.

723663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80413 (or 80410 counting only the distinct ones).

The product of its digits is 4536, while the sum is 27.

The square root of 723663 is about 850.6838425643. The cubic root of 723663 is about 89.7798322112.

The spelling of 723663 in words is "seven hundred twenty-three thousand, six hundred sixty-three".