9657319949 has 4 divisors (see below), whose sum is σ = 9892864380. Its totient is φ = 9421775520.

The previous prime is 9657319913. The next prime is 9657319993. The reversal of 9657319949 is 9499137569.

9657319949 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: 9499137569 = 887 ⋅10709287.

It can be written as a sum of positive squares in 2 ways, for example, as 3029731849 + 6627588100 = 55043^2 + 81410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9657319949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9657319891 and 9657319900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9657312949) 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, 117772154 + ... + 117772235.

It is an arithmetic number, because the mean of its divisors is an integer number (2473216095).

Almost surely, 2^9657319949 is an apocalyptic number.

It is an amenable number.

9657319949 is a deficient number, since it is larger than the sum of its proper divisors (235544431).

9657319949 is a wasteful number, since it uses less digits than its factorization.

9657319949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235544430.

The product of its digits is 16533720, while the sum is 62.

The square root of 9657319949 is about 98271.6640186783. The cubic root of 9657319949 is about 2129.5387150852.

The spelling of 9657319949 in words is "nine billion, six hundred fifty-seven million, three hundred nineteen thousand, nine hundred forty-nine".