723316591 has 4 divisors (see below), whose sum is σ = 723999384. Its totient is φ = 722633800.

The previous prime is 723316549. The next prime is 723316597. The reversal of 723316591 is 195613327.

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 723316591 - 2⁹ = 723316079 is a prime.

It is a super-2 number, since 2×723316591² = 1046373781631722562, which contains 22 as substring.

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 723316591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723316597) 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, 339805 + ... + 341926.

It is an arithmetic number, because the mean of its divisors is an integer number (180999846).

Almost surely, 2^723316591 is an apocalyptic number.

723316591 is a deficient number, since it is larger than the sum of its proper divisors (682793).

723316591 is a wasteful number, since it uses less digits than its factorization.

723316591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682792.

The product of its digits is 34020, while the sum is 37.

The square root of 723316591 is about 26894.5457481624. The cubic root of 723316591 is about 897.6550440679.

The spelling of 723316591 in words is "seven hundred twenty-three million, three hundred sixteen thousand, five hundred ninety-one".