723865385 has 4 divisors (see below), whose sum is σ = 868638468. Its totient is φ = 579092304.

The previous prime is 723865381. The next prime is 723865399. The reversal of 723865385 is 583568327.

723865385 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.

It can be written as a sum of positive squares in 2 ways, for example, as 347039641 + 376825744 = 18629^2 + 19412^2 .

It is a cyclic number.

It is not a de Polignac number, because 723865385 - 2² = 723865381 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (723865381) 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, 72386534 + ... + 72386543.

It is an arithmetic number, because the mean of its divisors is an integer number (217159617).

Almost surely, 2^723865385 is an apocalyptic number.

It is an amenable number.

723865385 is a deficient number, since it is larger than the sum of its proper divisors (144773083).

723865385 is a wasteful number, since it uses less digits than its factorization.

723865385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144773082.

The product of its digits is 1209600, while the sum is 47.

The square root of 723865385 is about 26904.7465143235. The cubic root of 723865385 is about 897.8820093056.

The spelling of 723865385 in words is "seven hundred twenty-three million, eight hundred sixty-five thousand, three hundred eighty-five".