9773299645 has 4 divisors (see below), whose sum is σ = 11727959580. Its totient is φ = 7818639712.

The previous prime is 9773299639. The next prime is 9773299649. The reversal of 9773299645 is 5469923779.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2831410521 + 6941889124 = 53211^2 + 83318^2 .

It is a cyclic number.

It is not a de Polignac number, because 9773299645 - 2¹³ = 9773291453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9773299649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 977329960 + ... + 977329969.

It is an arithmetic number, because the mean of its divisors is an integer number (2931989895).

Almost surely, 2^9773299645 is an apocalyptic number.

It is an amenable number.

9773299645 is a deficient number, since it is larger than the sum of its proper divisors (1954659935).

9773299645 is a wasteful number, since it uses less digits than its factorization.

9773299645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1954659934.

The product of its digits is 25719120, while the sum is 61.

The square root of 9773299645 is about 98860.0002275946. Note that the first 3 decimals coincide. The cubic root of 9773299645 is about 2138.0297209517.

The spelling of 9773299645 in words is "nine billion, seven hundred seventy-three million, two hundred ninety-nine thousand, six hundred forty-five".