2085375809 has 4 divisors (see below), whose sum is σ = 2274955440. Its totient is φ = 1895796180.

The previous prime is 2085375791. The next prime is 2085375811. The reversal of 2085375809 is 9085735802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2085375809 - 2²⁴ = 2068598593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2085375899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94789799 + ... + 94789820.

It is an arithmetic number, because the mean of its divisors is an integer number (568738860).

Almost surely, 2^2085375809 is an apocalyptic number.

It is an amenable number.

2085375809 is a deficient number, since it is larger than the sum of its proper divisors (189579631).

2085375809 is a wasteful number, since it uses less digits than its factorization.

2085375809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189579630.

The product of its (nonzero) digits is 604800, while the sum is 47.

The square root of 2085375809 is about 45665.9151775151. The cubic root of 2085375809 is about 1277.5996292309.

The spelling of 2085375809 in words is "two billion, eighty-five million, three hundred seventy-five thousand, eight hundred nine".