1243482689 has 2 divisors, whose sum is σ = 1243482690. Its totient is φ = 1243482688.

The previous prime is 1243482679. The next prime is 1243482769. The reversal of 1243482689 is 9862843421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1030089025 + 213393664 = 32095^2 + 14608^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1243482689 is a prime.

It is not a weakly prime, because it can be changed into another prime (1243482679) 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, 621741344 + 621741345.

It is an arithmetic number, because the mean of its divisors is an integer number (621741345).

Almost surely, 2^1243482689 is an apocalyptic number.

It is an amenable number.

1243482689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243482689 is an equidigital number, since it uses as much as digits as its factorization.

1243482689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 663552, while the sum is 47.

The square root of 1243482689 is about 35263.0499106359. The cubic root of 1243482689 is about 1075.3419324032.

The spelling of 1243482689 in words is "one billion, two hundred forty-three million, four hundred eighty-two thousand, six hundred eighty-nine".