9999888001 has 8 divisors (see below), whose sum is σ = 10034267040. Its totient is φ = 9965564448.

The previous prime is 9999887959. The next prime is 9999888007. The reversal of 9999888001 is 1008889999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9999888001 - 2²¹ = 9997790849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9999888007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364710 + ... + 391168.

It is an arithmetic number, because the mean of its divisors is an integer number (1254283380).

Almost surely, 2^9999888001 is an apocalyptic number.

It is an amenable number.

9999888001 is a deficient number, since it is larger than the sum of its proper divisors (34379039).

9999888001 is a wasteful number, since it uses less digits than its factorization.

9999888001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27743.

The product of its (nonzero) digits is 3359232, while the sum is 61.

The square root of 9999888001 is about 99999.4400034320. The cubic root of 9999888001 is about 2154.4266468508.

The spelling of 9999888001 in words is "nine billion, nine hundred ninety-nine million, eight hundred eighty-eight thousand, one".