9888999 has 8 divisors (see below), whose sum is σ = 13382400. Its totient is φ = 6494136.

The previous prime is 9888997. The next prime is 9889013. The reversal of 9888999 is 9998889.

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

It is not a de Polignac number, because 9888999 - 2¹ = 9888997 is a prime.

9888999 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9888997) 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, 24399 + ... + 24800.

It is an arithmetic number, because the mean of its divisors is an integer number (1672800).

Almost surely, 2^9888999 is an apocalyptic number.

9888999 is a deficient number, since it is larger than the sum of its proper divisors (3493401).

9888999 is a wasteful number, since it uses less digits than its factorization.

9888999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49269.

The product of its digits is 3359232, while the sum is 60.

The square root of 9888999 is about 3144.6778849351. The cubic root of 9888999 is about 214.6433531879.

The spelling of 9888999 in words is "nine million, eight hundred eighty-eight thousand, nine hundred ninety-nine".