99888909 has 8 divisors (see below), whose sum is σ = 140195040. Its totient is φ = 63087696.

The previous prime is 99888881. The next prime is 99888911. The reversal of 99888909 is 90988899.

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

It is not a de Polignac number, because 99888909 - 2¹⁷ = 99757837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99888979) 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, 876162 + ... + 876275.

It is an arithmetic number, because the mean of its divisors is an integer number (17524380).

Almost surely, 2^99888909 is an apocalyptic number.

It is an amenable number.

99888909 is a deficient number, since it is larger than the sum of its proper divisors (40306131).

99888909 is a wasteful number, since it uses less digits than its factorization.

99888909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1752459.

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

The square root of 99888909 is about 9994.4439064912. The cubic root of 99888909 is about 463.9869400927.

It can be divided in two parts, 9988890 and 9, that added together give a palindrome (9988899).

The spelling of 99888909 in words is "ninety-nine million, eight hundred eighty-eight thousand, nine hundred nine".