9973706809 has 12 divisors (see below), whose sum is σ = 10968637680. Its totient is φ = 9062207000.

The previous prime is 9973706789. The next prime is 9973706819. The reversal of 9973706809 is 9086073799.

It is not a de Polignac number, because 9973706809 - 2⁵ = 9973706777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9973706819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 218634 + ... + 260284.

It is an arithmetic number, because the mean of its divisors is an integer number (914053140).

Almost surely, 2^9973706809 is an apocalyptic number.

It is an amenable number.

9973706809 is a deficient number, since it is larger than the sum of its proper divisors (994930871).

9973706809 is a wasteful number, since it uses less digits than its factorization.

9973706809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43652 (or 43641 counting only the distinct ones).

The product of its (nonzero) digits is 5143824, while the sum is 58.

The square root of 9973706809 is about 99868.4475147181. The cubic root of 9973706809 is about 2152.5448005953.

The spelling of 9973706809 in words is "nine billion, nine hundred seventy-three million, seven hundred six thousand, eight hundred nine".