2773409821 has 12 divisors (see below), whose sum is σ = 3432184032. Its totient is φ = 2194345296.

The previous prime is 2773409819. The next prime is 2773409831. The reversal of 2773409821 is 1289043772.

It is not a de Polignac number, because 2773409821 - 2¹ = 2773409819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2773409831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1171011 + ... + 1173376.

It is an arithmetic number, because the mean of its divisors is an integer number (286015336).

Almost surely, 2^2773409821 is an apocalyptic number.

It is an amenable number.

2773409821 is a deficient number, since it is larger than the sum of its proper divisors (658774211).

2773409821 is a wasteful number, since it uses less digits than its factorization.

2773409821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2344420 (or 2344407 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 2773409821 is about 52663.1732902604. The cubic root of 2773409821 is about 1404.9839068077.

The spelling of 2773409821 in words is "two billion, seven hundred seventy-three million, four hundred nine thousand, eight hundred twenty-one".