9999200001 has 32 divisors (see below), whose sum is σ = 15414018048. Its totient is φ = 5647749120.

The previous prime is 9999199993. The next prime is 9999200017. The reversal of 9999200001 is 1000029999.

It is a happy number.

It is not a de Polignac number, because 9999200001 - 2³ = 9999199993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9999200051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 699936 + ... + 714078.

It is an arithmetic number, because the mean of its divisors is an integer number (481688064).

Almost surely, 2^9999200001 is an apocalyptic number.

It is an amenable number.

9999200001 is a deficient number, since it is larger than the sum of its proper divisors (5414818047).

9999200001 is a wasteful number, since it uses less digits than its factorization.

9999200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14541.

The product of its (nonzero) digits is 13122, while the sum is 39.

The square root of 9999200001 is about 99995.9999249970. Note that the first 4 decimals coincide. The cubic root of 9999200001 is about 2154.3772369799.

The spelling of 9999200001 in words is "nine billion, nine hundred ninety-nine million, two hundred thousand, one".