99999845 has 24 divisors (see below), whose sum is σ = 133923552. Its totient is φ = 71612640.

The previous prime is 99999839. The next prime is 99999847. The reversal of 99999845 is 54899999.

It is not a de Polignac number, because 99999845 - 2⁸ = 99999589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999847) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39302 + ... + 41768.

It is an arithmetic number, because the mean of its divisors is an integer number (5580148).

Almost surely, 2^99999845 is an apocalyptic number.

It is an amenable number.

99999845 is a deficient number, since it is larger than the sum of its proper divisors (33923707).

99999845 is a wasteful number, since it uses less digits than its factorization.

99999845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2561 (or 2550 counting only the distinct ones).

The product of its digits is 9447840, while the sum is 62.

The square root of 99999845 is about 9999.9922499970. The cubic root of 99999845 is about 464.1586435457.

The spelling of 99999845 in words is "ninety-nine million, nine hundred ninety-nine thousand, eight hundred forty-five".