99805023 has 12 divisors (see below), whose sum is σ = 144261208. Its totient is φ = 66491280.

The previous prime is 99805019. The next prime is 99805031. The reversal of 99805023 is 32050899.

It is not a de Polignac number, because 99805023 - 2² = 99805019 is a prime.

It is a super-2 number, since 2×99805023² = 19922085232061058, 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 (99805003) 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 11 ways as a sum of consecutive naturals, for example, 15093 + ... + 20673.

Almost surely, 2^99805023 is an apocalyptic number.

99805023 is a deficient number, since it is larger than the sum of its proper divisors (44456185).

99805023 is a wasteful number, since it uses less digits than its factorization.

99805023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7574 (or 7571 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 99805023 is about 9990.2463933579. The cubic root of 99805023 is about 463.8570193991.

The spelling of 99805023 in words is "ninety-nine million, eight hundred five thousand, twenty-three".