1244280689 has 2 divisors, whose sum is σ = 1244280690. Its totient is φ = 1244280688.

The previous prime is 1244280649. The next prime is 1244280707. The reversal of 1244280689 is 9860824421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 728082289 + 516198400 = 26983^2 + 22720^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244280689 - 2²⁰ = 1243232113 is a prime.

It is not a weakly prime, because it can be changed into another prime (1244280649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622140344 + 622140345.

It is an arithmetic number, because the mean of its divisors is an integer number (622140345).

Almost surely, 2^1244280689 is an apocalyptic number.

It is an amenable number.

1244280689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244280689 is an equidigital number, since it uses as much as digits as its factorization.

1244280689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 221184, while the sum is 44.

The square root of 1244280689 is about 35274.3630559079. The cubic root of 1244280689 is about 1075.5719153292.

The spelling of 1244280689 in words is "one billion, two hundred forty-four million, two hundred eighty thousand, six hundred eighty-nine".