1244222209 has 2 divisors, whose sum is σ = 1244222210. Its totient is φ = 1244222208.

The previous prime is 1244222183. The next prime is 1244222219. The reversal of 1244222209 is 9022224421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1017418609 + 226803600 = 31897^2 + 15060^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244222209 - 2¹⁹ = 1243697921 is a prime.

It is not a weakly prime, because it can be changed into another prime (1244222219) 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, 622111104 + 622111105.

It is an arithmetic number, because the mean of its divisors is an integer number (622111105).

Almost surely, 2^1244222209 is an apocalyptic number.

It is an amenable number.

1244222209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244222209 is an equidigital number, since it uses as much as digits as its factorization.

1244222209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 1244222209 is about 35273.5341155377. The cubic root of 1244222209 is about 1075.5550647821. Note that the first 3 decimals are identical.

The spelling of 1244222209 in words is "one billion, two hundred forty-four million, two hundred twenty-two thousand, two hundred nine".