2991229 has 2 divisors, whose sum is σ = 2991230. Its totient is φ = 2991228.

The previous prime is 2991217. The next prime is 2991239. The reversal of 2991229 is 9221992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2968729 + 22500 = 1723^2 + 150^2 .

It is a cyclic number.

It is not a de Polignac number, because 2991229 - 2⁹ = 2990717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2991194 and 2991203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2991239) 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, 1495614 + 1495615.

It is an arithmetic number, because the mean of its divisors is an integer number (1495615).

2^2991229 is an apocalyptic number.

It is an amenable number.

2991229 is a deficient number, since it is larger than the sum of its proper divisors (1).

2991229 is an equidigital number, since it uses as much as digits as its factorization.

2991229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 34.

The square root of 2991229 is about 1729.5169845943. The cubic root of 2991229 is about 144.0842645958.

The spelling of 2991229 in words is "two million, nine hundred ninety-one thousand, two hundred twenty-nine".