2099390085 has 72 divisors (see below), whose sum is σ = 4136388984. Its totient is φ = 979050240.

The previous prime is 2099390077. The next prime is 2099390087. The reversal of 2099390085 is 5800939902.

It can be written as a sum of positive squares in 4 ways, for example, as 137874564 + 1961515521 = 11742^2 + 44289^2 .

It is not a de Polignac number, because 2099390085 - 2³ = 2099390077 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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 2099390085.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2099390087) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 206215 + ... + 216155.

It is an arithmetic number, because the mean of its divisors is an integer number (57449847).

Almost surely, 2^2099390085 is an apocalyptic number.

It is an amenable number.

2099390085 is a deficient number, since it is larger than the sum of its proper divisors (2036998899).

2099390085 is a wasteful number, since it uses less digits than its factorization.

2099390085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10003 (or 9981 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 2099390085 is about 45819.1017480701. The cubic root of 2099390085 is about 1280.4551776751.

The spelling of 2099390085 in words is "two billion, ninety-nine million, three hundred ninety thousand, eighty-five".