2728774817 has 2 divisors, whose sum is σ = 2728774818. Its totient is φ = 2728774816.

The previous prime is 2728774759. The next prime is 2728774831. The reversal of 2728774817 is 7184778272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2613663376 + 115111441 = 51124^2 + 10729^2 .

It is a cyclic number.

It is not a de Polignac number, because 2728774817 - 2¹⁰ = 2728773793 is a prime.

It is not a weakly prime, because it can be changed into another prime (2728774837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1364387408 + 1364387409.

It is an arithmetic number, because the mean of its divisors is an integer number (1364387409).

Almost surely, 2^2728774817 is an apocalyptic number.

It is an amenable number.

2728774817 is a deficient number, since it is larger than the sum of its proper divisors (1).

2728774817 is an equidigital number, since it uses as much as digits as its factorization.

2728774817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2458624, while the sum is 53.

The square root of 2728774817 is about 52237.6762212869. The cubic root of 2728774817 is about 1397.4058793737.

The spelling of 2728774817 in words is "two billion, seven hundred twenty-eight million, seven hundred seventy-four thousand, eight hundred seventeen".