723665023 has 4 divisors (see below), whose sum is σ = 747009088. Its totient is φ = 700320960.

The previous prime is 723665009. The next prime is 723665039. The reversal of 723665023 is 320566327.

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

It is a cyclic number.

It is not a de Polignac number, because 723665023 - 2⁹ = 723664511 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 723665023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723665093) 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, 11671986 + ... + 11672047.

It is an arithmetic number, because the mean of its divisors is an integer number (186752272).

Almost surely, 2^723665023 is an apocalyptic number.

723665023 is a deficient number, since it is larger than the sum of its proper divisors (23344065).

723665023 is a wasteful number, since it uses less digits than its factorization.

723665023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23344064.

The product of its (nonzero) digits is 45360, while the sum is 34.

The square root of 723665023 is about 26901.0227129007. The cubic root of 723665023 is about 897.7991587094.

The spelling of 723665023 in words is "seven hundred twenty-three million, six hundred sixty-five thousand, twenty-three".