2812728869 has 2 divisors, whose sum is σ = 2812728870. Its totient is φ = 2812728868.

The previous prime is 2812728847. The next prime is 2812728871. The reversal of 2812728869 is 9688272182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2657402500 + 155326369 = 51550^2 + 12463^2 .

It is a cyclic number.

It is not a de Polignac number, because 2812728869 - 2⁸ = 2812728613 is a prime.

It is a super-2 number, since 2×2812728869² = 15822887381012038322, which contains 22 as substring.

Together with 2812728871, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2812728869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2812728899) 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 as a sum of consecutive naturals, namely, 1406364434 + 1406364435.

It is an arithmetic number, because the mean of its divisors is an integer number (1406364435).

Almost surely, 2^2812728869 is an apocalyptic number.

It is an amenable number.

2812728869 is a deficient number, since it is larger than the sum of its proper divisors (1).

2812728869 is an equidigital number, since it uses as much as digits as its factorization.

2812728869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1548288, while the sum is 53.

The square root of 2812728869 is about 53035.1663427202. The cubic root of 2812728869 is about 1411.5923309896.

The spelling of 2812728869 in words is "two billion, eight hundred twelve million, seven hundred twenty-eight thousand, eight hundred sixty-nine".