9773820009 has 12 divisors (see below), whose sum is σ = 14118682500. Its totient is φ = 6515445024.

The previous prime is 9773819987. The next prime is 9773820061. The reversal of 9773820009 is 9000283779.

It can be written as a sum of positive squares in 2 ways, for example, as 900180009 + 8873640000 = 30003^2 + 94200^2 .

It is not a de Polignac number, because 9773820009 - 2²⁰ = 9772771433 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (9773820509) 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 11 ways as a sum of consecutive naturals, for example, 164667 + ... + 216015.

It is an arithmetic number, because the mean of its divisors is an integer number (1176556875).

Almost surely, 2^9773820009 is an apocalyptic number.

It is an amenable number.

9773820009 is a deficient number, since it is larger than the sum of its proper divisors (4344862491).

9773820009 is a wasteful number, since it uses less digits than its factorization.

9773820009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72504 (or 72501 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 9773820009 is about 98862.6320153373. The cubic root of 9773820009 is about 2138.0676656239.

The spelling of 9773820009 in words is "nine billion, seven hundred seventy-three million, eight hundred twenty thousand, nine".