99845145 has 24 divisors (see below), whose sum is σ = 173838600. Its totient is φ = 53012736.

The previous prime is 99845117. The next prime is 99845147. The reversal of 99845145 is 54154899.

It can be written as a sum of positive squares in 4 ways, for example, as 32867289 + 66977856 = 5733^2 + 8184^2 .

It is not a de Polignac number, because 99845145 - 2⁸ = 99844889 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 99845145.

It is not an unprimeable number, because it can be changed into a prime (99845147) 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 23 ways as a sum of consecutive naturals, for example, 5461 + ... + 15149.

It is an arithmetic number, because the mean of its divisors is an integer number (7243275).

Almost surely, 2^99845145 is an apocalyptic number.

It is an amenable number.

99845145 is a deficient number, since it is larger than the sum of its proper divisors (73993455).

99845145 is a wasteful number, since it uses less digits than its factorization.

99845145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9929 (or 9926 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 99845145 is about 9992.2542501680. The cubic root of 99845145 is about 463.9191685022.

It can be divided in two parts, 9984 and 5145, that added together give a square (15129 = 123²).

The spelling of 99845145 in words is "ninety-nine million, eight hundred forty-five thousand, one hundred forty-five".