9960009809 has 4 divisors (see below), whose sum is σ = 10281300480. Its totient is φ = 9638719140.

The previous prime is 9960009799. The next prime is 9960009811. The reversal of 9960009809 is 9089000699.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9960009809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9960009869) 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, 160645289 + ... + 160645350.

It is an arithmetic number, because the mean of its divisors is an integer number (2570325120).

Almost surely, 2^9960009809 is an apocalyptic number.

It is an amenable number.

9960009809 is a deficient number, since it is larger than the sum of its proper divisors (321290671).

9960009809 is a wasteful number, since it uses less digits than its factorization.

9960009809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321290670.

The product of its (nonzero) digits is 314928, while the sum is 50.

The square root of 9960009809 is about 99799.8487423703. The cubic root of 9960009809 is about 2151.5589781178.

The spelling of 9960009809 in words is "nine billion, nine hundred sixty million, nine thousand, eight hundred nine".