723353993 has 2 divisors, whose sum is σ = 723353994. Its totient is φ = 723353992.

The previous prime is 723353977. The next prime is 723354059. The reversal of 723353993 is 399353327.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 708198544 + 15155449 = 26612^2 + 3893^2 .

It is an emirp because it is prime and its reverse (399353327) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 723353993 - 2⁴ = 723353977 is a prime.

It is not a weakly prime, because it can be changed into another prime (723355993) 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, 361676996 + 361676997.

It is an arithmetic number, because the mean of its divisors is an integer number (361676997).

Almost surely, 2^723353993 is an apocalyptic number.

It is an amenable number.

723353993 is a deficient number, since it is larger than the sum of its proper divisors (1).

723353993 is an equidigital number, since it uses as much as digits as its factorization.

723353993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 459270, while the sum is 44.

The square root of 723353993 is about 26895.2410846231. The cubic root of 723353993 is about 897.6705160921.

The spelling of 723353993 in words is "seven hundred twenty-three million, three hundred fifty-three thousand, nine hundred ninety-three".