1244223289 has 2 divisors, whose sum is σ = 1244223290. Its totient is φ = 1244223288.

The previous prime is 1244223271. The next prime is 1244223307. The reversal of 1244223289 is 9823224421.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1244223271) and next prime (1244223307).

It can be written as a sum of positive squares in only one way, i.e., 1215707689 + 28515600 = 34867^2 + 5340^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244223289 - 2⁵ = 1244223257 is a prime.

It is not a weakly prime, because it can be changed into another prime (1244223259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622111644 + 622111645.

It is an arithmetic number, because the mean of its divisors is an integer number (622111645).

Almost surely, 2^1244223289 is an apocalyptic number.

It is an amenable number.

1244223289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244223289 is an equidigital number, since it uses as much as digits as its factorization.

1244223289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 37.

The square root of 1244223289 is about 35273.5494244625. The cubic root of 1244223289 is about 1075.5553759803. Note that the first 3 decimals are identical.

The spelling of 1244223289 in words is "one billion, two hundred forty-four million, two hundred twenty-three thousand, two hundred eighty-nine".