2068840009 has 4 divisors (see below), whose sum is σ = 2069111700. Its totient is φ = 2068568320.

The previous prime is 2068839943. The next prime is 2068840013. The reversal of 2068840009 is 9000488602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 605012409 + 1463827600 = 24597^2 + 38260^2 .

It is a cyclic number.

It is not a de Polignac number, because 2068840009 - 2⁷ = 2068839881 is a prime.

It is a super-3 number, since 3×2068840009³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2068840009.

It is not an unprimeable number, because it can be changed into a prime (2068840069) 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, 124084 + ... + 139765.

It is an arithmetic number, because the mean of its divisors is an integer number (517277925).

Almost surely, 2^2068840009 is an apocalyptic number.

It is an amenable number.

2068840009 is a deficient number, since it is larger than the sum of its proper divisors (271691).

2068840009 is an equidigital number, since it uses as much as digits as its factorization.

2068840009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271690.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 2068840009 is about 45484.5029543030. The cubic root of 2068840009 is about 1274.2137937051.

The spelling of 2068840009 in words is "two billion, sixty-eight million, eight hundred forty thousand, nine".