723666173 has 2 divisors, whose sum is σ = 723666174. Its totient is φ = 723666172.

The previous prime is 723666161. The next prime is 723666179. The reversal of 723666173 is 371666327.

723666173 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., 558235129 + 165431044 = 23627^2 + 12862^2 .

It is a cyclic number.

It is not a de Polignac number, because 723666173 - 2²⁴ = 706888957 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 723666173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (723666179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361833086 + 361833087.

It is an arithmetic number, because the mean of its divisors is an integer number (361833087).

Almost surely, 2^723666173 is an apocalyptic number.

It is an amenable number.

723666173 is a deficient number, since it is larger than the sum of its proper divisors (1).

723666173 is an equidigital number, since it uses as much as digits as its factorization.

723666173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 41.

The square root of 723666173 is about 26901.0440875443. The cubic root of 723666173 is about 897.7996342832.

The spelling of 723666173 in words is "seven hundred twenty-three million, six hundred sixty-six thousand, one hundred seventy-three".