723389 has 4 divisors (see below), whose sum is σ = 740256. Its totient is φ = 706524.

The previous prime is 723379. The next prime is 723391. The reversal of 723389 is 983327.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 723389 - 2⁸ = 723133 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723319) 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 3 ways as a sum of consecutive naturals, for example, 8369 + ... + 8454.

It is an arithmetic number, because the mean of its divisors is an integer number (185064).

2⁷²³³⁸⁹ is an apocalyptic number.

It is an amenable number.

723389 is a deficient number, since it is larger than the sum of its proper divisors (16867).

723389 is a wasteful number, since it uses less digits than its factorization.

723389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16866.

The product of its digits is 9072, while the sum is 32.

The square root of 723389 is about 850.5227804121. The cubic root of 723389 is about 89.7684996897.

The spelling of 723389 in words is "seven hundred twenty-three thousand, three hundred eighty-nine".