9723645 has 48 divisors (see below), whose sum is σ = 17926272. Its totient is φ = 5054400.

The previous prime is 9723631. The next prime is 9723647. The reversal of 9723645 is 5463279.

9723645 is a `hidden beast` number, since 9 + 7 + 2 + 3 + 645 = 666.

It is not a de Polignac number, because 9723645 - 2¹⁰ = 9722621 is a prime.

It is a Curzon number.

9723645 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9723647) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 64320 + ... + 64470.

It is an arithmetic number, because the mean of its divisors is an integer number (373464).

Almost surely, 2^9723645 is an apocalyptic number.

It is an amenable number.

9723645 is a deficient number, since it is larger than the sum of its proper divisors (8202627).

9723645 is a wasteful number, since it uses less digits than its factorization.

9723645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224 (or 212 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 9723645 is about 3118.2759659786. The cubic root of 9723645 is about 213.4402716353.

The spelling of 9723645 in words is "nine million, seven hundred twenty-three thousand, six hundred forty-five".