9657444397 has 4 divisors (see below), whose sum is σ = 9661171420. Its totient is φ = 9653717376.

The previous prime is 9657444389. The next prime is 9657444463. The reversal of 9657444397 is 7934447569.

9657444397 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, and also an emirpimes, since its reverse is a distinct semiprime: 7934447569 = 1123 ⋅7065403.

It can be written as a sum of positive squares in 2 ways, for example, as 6666885801 + 2990558596 = 81651^2 + 54686^2 .

It is a cyclic number.

It is not a de Polignac number, because 9657444397 - 2³ = 9657444389 is a prime.

It is a super-2 number, since 2×9657444397² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9607444397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1859622 + ... + 1864807.

It is an arithmetic number, because the mean of its divisors is an integer number (2415292855).

Almost surely, 2^9657444397 is an apocalyptic number.

It is an amenable number.

9657444397 is a deficient number, since it is larger than the sum of its proper divisors (3727023).

9657444397 is a wasteful number, since it uses less digits than its factorization.

9657444397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3727022.

The product of its digits is 22861440, while the sum is 58.

The square root of 9657444397 is about 98272.2972001774. The cubic root of 9657444397 is about 2129.5478624020.

The spelling of 9657444397 in words is "nine billion, six hundred fifty-seven million, four hundred forty-four thousand, three hundred ninety-seven".