2766389 has 2 divisors, whose sum is σ = 2766390. Its totient is φ = 2766388.

The previous prime is 2766367. The next prime is 2766431. The reversal of 2766389 is 9836672.

2766389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2696164 + 70225 = 1642^2 + 265^2 .

It is a cyclic number.

It is not a de Polignac number, because 2766389 - 2¹⁶ = 2700853 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2⁵ + 7⁶ + 6³ + 6³ + 3⁹ + 8⁷ + 9⁶ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2766329) 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, 1383194 + 1383195.

It is an arithmetic number, because the mean of its divisors is an integer number (1383195).

2^2766389 is an apocalyptic number.

It is an amenable number.

2766389 is a deficient number, since it is larger than the sum of its proper divisors (1).

2766389 is an equidigital number, since it uses as much as digits as its factorization.

2766389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 41.

The square root of 2766389 is about 1663.2465241208. The cubic root of 2766389 is about 140.3797343877.

The spelling of 2766389 in words is "two million, seven hundred sixty-six thousand, three hundred eighty-nine".