723710605 has 4 divisors (see below), whose sum is σ = 868452732. Its totient is φ = 578968480.

The previous prime is 723710591. The next prime is 723710609. The reversal of 723710605 is 506017327.

723710605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 506017327 = 881 ⋅574367.

It can be written as a sum of positive squares in 2 ways, for example, as 90383049 + 633327556 = 9507^2 + 25166^2 .

It is not a de Polignac number, because 723710605 - 2⁹ = 723710093 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723710609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72371056 + ... + 72371065.

It is an arithmetic number, because the mean of its divisors is an integer number (217113183).

Almost surely, 2^723710605 is an apocalyptic number.

It is an amenable number.

723710605 is a deficient number, since it is larger than the sum of its proper divisors (144742127).

723710605 is a wasteful number, since it uses less digits than its factorization.

723710605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144742126.

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 723710605 is about 26901.8699164203. The cubic root of 723710605 is about 897.8180084169.

The spelling of 723710605 in words is "seven hundred twenty-three million, seven hundred ten thousand, six hundred five".