99122809 has 8 divisors (see below), whose sum is σ = 100219680. Its totient is φ = 98030016.

The previous prime is 99122797. The next prime is 99122819. The reversal of 99122809 is 90822199.

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 99122809 - 2¹⁵ = 99090041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99122819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82914 + ... + 84100.

It is an arithmetic number, because the mean of its divisors is an integer number (12527460).

Almost surely, 2^99122809 is an apocalyptic number.

It is an amenable number.

99122809 is a deficient number, since it is larger than the sum of its proper divisors (1096871).

99122809 is a wasteful number, since it uses less digits than its factorization.

99122809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2039.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 99122809 is about 9956.0438428123. The cubic root of 99122809 is about 462.7977088852.

It can be divided in two parts, 9912 and 2809, that added together give a palindrome (12721).

The spelling of 99122809 in words is "ninety-nine million, one hundred twenty-two thousand, eight hundred nine".