2211779 has 2 divisors, whose sum is σ = 2211780. Its totient is φ = 2211778.

The previous prime is 2211707. The next prime is 2211787. The reversal of 2211779 is 9771122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2211779 is a prime.

It is not a weakly prime, because it can be changed into another prime (2211179) 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, 1105889 + 1105890.

It is an arithmetic number, because the mean of its divisors is an integer number (1105890).

2^2211779 is an apocalyptic number.

2211779 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211779 is an equidigital number, since it uses as much as digits as its factorization.

2211779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1764, while the sum is 29.

The square root of 2211779 is about 1487.2050968175. The cubic root of 2211779 is about 130.2908478174.

The spelling of 2211779 in words is "two million, two hundred eleven thousand, seven hundred seventy-nine".