99985005 has 12 divisors (see below), whose sum is σ = 173307420. Its totient is φ = 53325312.

The previous prime is 99984991. The next prime is 99985009. The reversal of 99985005 is 50058999.

It can be written as a sum of positive squares in 2 ways, for example, as 19954089 + 80030916 = 4467^2 + 8946^2 .

It is not a de Polignac number, because 99985005 - 2⁷ = 99984877 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 2221889 = 99985005 / (9 + 9 + 9 + 8 + 5 + 0 + 0 + 5).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99985009) 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 11 ways as a sum of consecutive naturals, for example, 1110900 + ... + 1110989.

It is an arithmetic number, because the mean of its divisors is an integer number (14442285).

Almost surely, 2^99985005 is an apocalyptic number.

It is an amenable number.

99985005 is a deficient number, since it is larger than the sum of its proper divisors (73322415).

99985005 is a wasteful number, since it uses less digits than its factorization.

99985005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221900 (or 2221897 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 45.

The square root of 99985005 is about 9999.2502218916. The cubic root of 99985005 is about 464.1356819934.

The spelling of 99985005 in words is "ninety-nine million, nine hundred eighty-five thousand, five".