2816806393 has 4 divisors (see below), whose sum is σ = 2817445108. Its totient is φ = 2816167680.

The previous prime is 2816806367. The next prime is 2816806457. The reversal of 2816806393 is 3936086182.

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 647855209 + 2168951184 = 25453^2 + 46572^2 .

It is a cyclic number.

It is not a de Polignac number, because 2816806393 - 2⁹ = 2816805881 is a prime.

It is a super-3 number, since 3×2816806393³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2816806493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312696 + ... + 321577.

It is an arithmetic number, because the mean of its divisors is an integer number (704361277).

Almost surely, 2^2816806393 is an apocalyptic number.

It is an amenable number.

2816806393 is a deficient number, since it is larger than the sum of its proper divisors (638715).

2816806393 is an equidigital number, since it uses as much as digits as its factorization.

2816806393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638714.

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 2816806393 is about 53073.5941217476. The cubic root of 2816806393 is about 1412.2741152140.

The spelling of 2816806393 in words is "two billion, eight hundred sixteen million, eight hundred six thousand, three hundred ninety-three".