723720384649 has 2 divisors, whose sum is σ = 723720384650. Its totient is φ = 723720384648.

The previous prime is 723720384631. The next prime is 723720384719. The reversal of 723720384649 is 946483027327.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 713813765625 + 9906619024 = 844875^2 + 99532^2 .

It is a cyclic number.

It is not a de Polignac number, because 723720384649 - 2²³ = 723711996041 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 723720384649.

It is not a weakly prime, because it can be changed into another prime (723720384619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361860192324 + 361860192325.

It is an arithmetic number, because the mean of its divisors is an integer number (361860192325).

Almost surely, 2^723720384649 is an apocalyptic number.

It is an amenable number.

723720384649 is a deficient number, since it is larger than the sum of its proper divisors (1).

723720384649 is an equidigital number, since it uses as much as digits as its factorization.

723720384649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12192768, while the sum is 55.

The spelling of 723720384649 in words is "seven hundred twenty-three billion, seven hundred twenty million, three hundred eighty-four thousand, six hundred forty-nine".