2773891 has 2 divisors, whose sum is σ = 2773892. Its totient is φ = 2773890.

The previous prime is 2773871. The next prime is 2773919. The reversal of 2773891 is 1983772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2773891 - 2¹¹ = 2771843 is a prime.

It is the 1666-th Hogben number.

It is a self number, because there is not a number n which added to its sum of digits gives 2773891.

It is not a weakly prime, because it can be changed into another prime (2773871) by changing a digit.

It is a nontrivial repunit in base 1665.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1386945 + 1386946.

It is an arithmetic number, because the mean of its divisors is an integer number (1386946).

2^2773891 is an apocalyptic number.

2773891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2773891 is an equidigital number, since it uses as much as digits as its factorization.

2773891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 37.

The square root of 2773891 is about 1665.5002251576. The cubic root of 2773891 is about 140.5065155728.

The spelling of 2773891 in words is "two million, seven hundred seventy-three thousand, eight hundred ninety-one".