9722645 has 4 divisors (see below), whose sum is σ = 11667180. Its totient is φ = 7778112.

The previous prime is 9722641. The next prime is 9722659. The reversal of 9722645 is 5462279.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5462279 = 59 ⋅92581.

It can be written as a sum of positive squares in 2 ways, for example, as 6421156 + 3301489 = 2534^2 + 1817^2 .

It is a cyclic number.

It is not a de Polignac number, because 9722645 - 2² = 9722641 is a prime.

It is a d-powerful number, because it can be written as 9 + 7³ + 2¹¹ + 2²³ + 6⁷ + 4¹⁰ + 5⁵ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9722641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 972260 + ... + 972269.

It is an arithmetic number, because the mean of its divisors is an integer number (2916795).

Almost surely, 2^9722645 is an apocalyptic number.

It is an amenable number.

9722645 is a deficient number, since it is larger than the sum of its proper divisors (1944535).

9722645 is a wasteful number, since it uses less digits than its factorization.

9722645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944534.

The product of its digits is 30240, while the sum is 35.

The square root of 9722645 is about 3118.1156168430. The cubic root of 9722645 is about 213.4329545031.

The spelling of 9722645 in words is "nine million, seven hundred twenty-two thousand, six hundred forty-five".