2774721689 has 2 divisors, whose sum is σ = 2774721690. Its totient is φ = 2774721688.

The previous prime is 2774721647. The next prime is 2774721707. The reversal of 2774721689 is 9861274772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2773075600 + 1646089 = 52660^2 + 1283^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2774721689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2774721689.

It is not a weakly prime, because it can be changed into another prime (2774727689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1387360844 + 1387360845.

It is an arithmetic number, because the mean of its divisors is an integer number (1387360845).

Almost surely, 2^2774721689 is an apocalyptic number.

It is an amenable number.

2774721689 is a deficient number, since it is larger than the sum of its proper divisors (1).

2774721689 is an equidigital number, since it uses as much as digits as its factorization.

2774721689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2370816, while the sum is 53.

The square root of 2774721689 is about 52675.6270869175. The cubic root of 2774721689 is about 1405.2053986426.

The spelling of 2774721689 in words is "two billion, seven hundred seventy-four million, seven hundred twenty-one thousand, six hundred eighty-nine".