723321822613 has 16 divisors (see below), whose sum is σ = 800084646256. Its totient is φ = 649579668480.

The previous prime is 723321822599. The next prime is 723321822637. The reversal of 723321822613 is 316228123327.

723321822613 = 601382² + 601383².

723321822613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 139751111889 + 583570710724 = 373833^2 + 763918^2 .

It is a cyclic number.

It is not a de Polignac number, because 723321822613 - 2²¹ = 723319725461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723321802613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6059695 + ... + 6177907.

It is an arithmetic number, because the mean of its divisors is an integer number (50005290391).

Almost surely, 2^723321822613 is an apocalyptic number.

723321822613 is the 601383-rd centered square number.

It is an amenable number.

723321822613 is a deficient number, since it is larger than the sum of its proper divisors (76762823643).

723321822613 is a wasteful number, since it uses less digits than its factorization.

723321822613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130984.

The product of its digits is 145152, while the sum is 40.

The spelling of 723321822613 in words is "seven hundred twenty-three billion, three hundred twenty-one million, eight hundred twenty-two thousand, six hundred thirteen".