2229779 has 2 divisors, whose sum is σ = 2229780. Its totient is φ = 2229778.

The previous prime is 2229769. The next prime is 2229791. The reversal of 2229779 is 9779222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2229779 - 2⁸ = 2229523 is a prime.

It is not a weakly prime, because it can be changed into another prime (2229769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1114889 + 1114890.

It is an arithmetic number, because the mean of its divisors is an integer number (1114890).

2^2229779 is an apocalyptic number.

2229779 is a deficient number, since it is larger than the sum of its proper divisors (1).

2229779 is an equidigital number, since it uses as much as digits as its factorization.

2229779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 38.

The square root of 2229779 is about 1493.2444542003. The cubic root of 2229779 is about 130.6433396104.

It can be divided in two parts, 222 and 9779, that added together give a palindrome (10001).

The spelling of 2229779 in words is "two million, two hundred twenty-nine thousand, seven hundred seventy-nine".