723314529521 has 2 divisors, whose sum is σ = 723314529522. Its totient is φ = 723314529520.

The previous prime is 723314529451. The next prime is 723314529557. The reversal of 723314529521 is 125925413327.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 630691693921 + 92622835600 = 794161^2 + 304340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-723314529521 is a prime.

It is a super-4 number, since 4×723314529521⁴ (a number of 49 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (723314523521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361657264760 + 361657264761.

It is an arithmetic number, because the mean of its divisors is an integer number (361657264761).

Almost surely, 2^723314529521 is an apocalyptic number.

It is an amenable number.

723314529521 is a deficient number, since it is larger than the sum of its proper divisors (1).

723314529521 is an equidigital number, since it uses as much as digits as its factorization.

723314529521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453600, while the sum is 44.

The spelling of 723314529521 in words is "seven hundred twenty-three billion, three hundred fourteen million, five hundred twenty-nine thousand, five hundred twenty-one".