723091938389 has 2 divisors, whose sum is σ = 723091938390. Its totient is φ = 723091938388.

The previous prime is 723091938353. The next prime is 723091938403. The reversal of 723091938389 is 983839190327.

723091938389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 587330640625 + 135761297764 = 766375^2 + 368458^2 .

It is a cyclic number.

It is not a de Polignac number, because 723091938389 - 2⁸ = 723091938133 is a prime.

It is a super-2 number, since 2×723091938389² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (723091938319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361545969194 + 361545969195.

It is an arithmetic number, because the mean of its divisors is an integer number (361545969195).

Almost surely, 2^723091938389 is an apocalyptic number.

It is an amenable number.

723091938389 is a deficient number, since it is larger than the sum of its proper divisors (1).

723091938389 is an equidigital number, since it uses as much as digits as its factorization.

723091938389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17635968, while the sum is 62.

The spelling of 723091938389 in words is "seven hundred twenty-three billion, ninety-one million, nine hundred thirty-eight thousand, three hundred eighty-nine".