9999099 has 32 divisors (see below), whose sum is σ = 16346880. Its totient is φ = 5990400.

The previous prime is 9999083. The next prime is 9999161. The reversal of 9999099 is 9909999.

It is not a de Polignac number, because 9999099 - 2⁴ = 9999083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9999049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38779 + ... + 39035.

It is an arithmetic number, because the mean of its divisors is an integer number (510840).

Almost surely, 2^9999099 is an apocalyptic number.

9999099 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

9999099 is a deficient number, since it is larger than the sum of its proper divisors (6347781).

9999099 is a wasteful number, since it uses less digits than its factorization.

9999099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 531441, while the sum is 54.

The square root of 9999099 is about 3162.1351963507. The cubic root of 9999099 is about 215.4369983233.

The spelling of 9999099 in words is "nine million, nine hundred ninety-nine thousand, ninety-nine".