9722791 has 8 divisors (see below), whose sum is σ = 10505600. Its totient is φ = 8944992.

The previous prime is 9722789. The next prime is 9722807. The reversal of 9722791 is 1972279.

9722791 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 9722791 - 2¹ = 9722789 is a prime.

It is a Duffinian number.

9722791 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 9722791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9722771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3466 + ... + 5608.

It is an arithmetic number, because the mean of its divisors is an integer number (1313200).

Almost surely, 2^9722791 is an apocalyptic number.

9722791 is a deficient number, since it is larger than the sum of its proper divisors (782809).

9722791 is a wasteful number, since it uses less digits than its factorization.

9722791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2505.

The product of its digits is 15876, while the sum is 37.

The square root of 9722791 is about 3118.1390283308. The cubic root of 9722791 is about 213.4340228356.

The spelling of 9722791 in words is "nine million, seven hundred twenty-two thousand, seven hundred ninety-one".