9909910009 has 4 divisors (see below), whose sum is σ = 10431484240. Its totient is φ = 9388335780.

The previous prime is 9909910007. The next prime is 9909910033. The reversal of 9909910009 is 9000199099.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9000199099 = 56999 ⋅157901.

It is a cyclic number.

It is not a de Polignac number, because 9909910009 - 2¹ = 9909910007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9909910007) 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, 260787087 + ... + 260787124.

It is an arithmetic number, because the mean of its divisors is an integer number (2607871060).

Almost surely, 2^9909910009 is an apocalyptic number.

It is an amenable number.

9909910009 is a deficient number, since it is larger than the sum of its proper divisors (521574231).

9909910009 is a wasteful number, since it uses less digits than its factorization.

9909910009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521574230.

The product of its (nonzero) digits is 59049, while the sum is 46.

The square root of 9909910009 is about 99548.5309233642. The cubic root of 9909910009 is about 2147.9453967679.

The spelling of 9909910009 in words is "nine billion, nine hundred nine million, nine hundred ten thousand, nine".