2776789 has 2 divisors, whose sum is σ = 2776790. Its totient is φ = 2776788.

The previous prime is 2776783. The next prime is 2776799. The reversal of 2776789 is 9876772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2722500 + 54289 = 1650^2 + 233^2 .

It is a cyclic number.

It is not a de Polignac number, because 2776789 - 2¹⁷ = 2645717 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2776783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1388394 + 1388395.

It is an arithmetic number, because the mean of its divisors is an integer number (1388395).

2^2776789 is an apocalyptic number.

It is an amenable number.

2776789 is a deficient number, since it is larger than the sum of its proper divisors (1).

2776789 is an equidigital number, since it uses as much as digits as its factorization.

2776789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 296352, while the sum is 46.

The square root of 2776789 is about 1666.3700069312. The cubic root of 2776789 is about 140.5554295546. Note that the first 3 decimals are identical.

The spelling of 2776789 in words is "two million, seven hundred seventy-six thousand, seven hundred eighty-nine".