2779229 has 2 divisors, whose sum is σ = 2779230. Its totient is φ = 2779228.

The previous prime is 2779201. The next prime is 2779237. The reversal of 2779229 is 9229772.

2779229 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., 2553604 + 225625 = 1598^2 + 475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2779229 is a prime.

It is a super-2 number, since 2×2779229² = 15448227668882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2779192 and 2779201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2779289) 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, 1389614 + 1389615.

It is an arithmetic number, because the mean of its divisors is an integer number (1389615).

2^2779229 is an apocalyptic number.

It is an amenable number.

2779229 is a deficient number, since it is larger than the sum of its proper divisors (1).

2779229 is an equidigital number, since it uses as much as digits as its factorization.

2779229 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 2779229 is about 1667.1019764849. The cubic root of 2779229 is about 140.5965867863.

The spelling of 2779229 in words is "two million, seven hundred seventy-nine thousand, two hundred twenty-nine".