2773642309 has 2 divisors, whose sum is σ = 2773642310. Its totient is φ = 2773642308.

The previous prime is 2773642307. The next prime is 2773642321. The reversal of 2773642309 is 9032463772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2636822500 + 136819809 = 51350^2 + 11697^2 .

It is a cyclic number.

It is not a de Polignac number, because 2773642309 - 2¹ = 2773642307 is a prime.

Together with 2773642307, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2773642307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1386821154 + 1386821155.

It is an arithmetic number, because the mean of its divisors is an integer number (1386821155).

Almost surely, 2^2773642309 is an apocalyptic number.

It is an amenable number.

2773642309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2773642309 is an equidigital number, since it uses as much as digits as its factorization.

2773642309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 43.

The square root of 2773642309 is about 52665.3805549718. The cubic root of 2773642309 is about 1405.0231644716.

The spelling of 2773642309 in words is "two billion, seven hundred seventy-three million, six hundred forty-two thousand, three hundred nine".