2776289 has 2 divisors, whose sum is σ = 2776290. Its totient is φ = 2776288.

The previous prime is 2776259. The next prime is 2776303. The reversal of 2776289 is 9826772.

2776289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2505889 + 270400 = 1583^2 + 520^2 .

It is a cyclic number.

It is not a de Polignac number, because 2776289 - 2¹² = 2772193 is a prime.

It is a super-2 number, since 2×2776289² = 15415561223042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2776259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1388144 + 1388145.

It is an arithmetic number, because the mean of its divisors is an integer number (1388145).

2^2776289 is an apocalyptic number.

It is an amenable number.

2776289 is a deficient number, since it is larger than the sum of its proper divisors (1).

2776289 is an equidigital number, since it uses as much as digits as its factorization.

2776289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 41.

The square root of 2776289 is about 1666.2199734729. The cubic root of 2776289 is about 140.5469927195.

The spelling of 2776289 in words is "two million, seven hundred seventy-six thousand, two hundred eighty-nine".