723489823457 has 2 divisors, whose sum is σ = 723489823458. Its totient is φ = 723489823456.

The previous prime is 723489823439. The next prime is 723489823489. The reversal of 723489823457 is 754328984327.

723489823457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 522484654561 + 201005168896 = 722831^2 + 448336^2 .

It is a cyclic number.

It is not a de Polignac number, because 723489823457 - 2⁶ = 723489823393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 723489823457.

It is not a weakly prime, because it can be changed into another prime (723489823957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361744911728 + 361744911729.

It is an arithmetic number, because the mean of its divisors is an integer number (361744911729).

Almost surely, 2^723489823457 is an apocalyptic number.

It is an amenable number.

723489823457 is a deficient number, since it is larger than the sum of its proper divisors (1).

723489823457 is an equidigital number, since it uses as much as digits as its factorization.

723489823457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81285120, while the sum is 62.

The spelling of 723489823457 in words is "seven hundred twenty-three billion, four hundred eighty-nine million, eight hundred twenty-three thousand, four hundred fifty-seven".