99810919 has 16 divisors (see below), whose sum is σ = 109438560. Its totient is φ = 90478080.

The previous prime is 99810911. The next prime is 99810923. The reversal of 99810919 is 91901899.

It is a cyclic number.

It is not a de Polignac number, because 99810919 - 2³ = 99810911 is a prime.

It is a super-2 number, since 2×99810919² = 19924439103249122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99810911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 324964 + ... + 325270.

It is an arithmetic number, because the mean of its divisors is an integer number (6839910).

Almost surely, 2^99810919 is an apocalyptic number.

99810919 is a deficient number, since it is larger than the sum of its proper divisors (9627641).

99810919 is a wasteful number, since it uses less digits than its factorization.

99810919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690.

The product of its (nonzero) digits is 52488, while the sum is 46.

The square root of 99810919 is about 9990.5414768170. The cubic root of 99810919 is about 463.8661533653.

The spelling of 99810919 in words is "ninety-nine million, eight hundred ten thousand, nine hundred nineteen".