723897445 has 8 divisors (see below), whose sum is σ = 869823000. Its totient is φ = 578353920.

The previous prime is 723897443. The next prime is 723897457. The reversal of 723897445 is 544798327.

It is a happy number.

723897445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 52983841 + 670913604 = 7279^2 + 25902^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 723897445 - 2¹ = 723897443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723897443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91320 + ... + 98929.

It is an arithmetic number, because the mean of its divisors is an integer number (108727875).

Almost surely, 2^723897445 is an apocalyptic number.

It is an amenable number.

723897445 is a deficient number, since it is larger than the sum of its proper divisors (145925555).

723897445 is a wasteful number, since it uses less digits than its factorization.

723897445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191015.

The product of its digits is 1693440, while the sum is 49.

The square root of 723897445 is about 26905.3423133771. The cubic root of 723897445 is about 897.8952648422.

The spelling of 723897445 in words is "seven hundred twenty-three million, eight hundred ninety-seven thousand, four hundred forty-five".