1289362049 has 2 divisors, whose sum is σ = 1289362050. Its totient is φ = 1289362048.

The previous prime is 1289362033. The next prime is 1289362057. The reversal of 1289362049 is 9402639821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1288810000 + 552049 = 35900^2 + 743^2 .

It is a cyclic number.

It is not a de Polignac number, because 1289362049 - 2⁴ = 1289362033 is a prime.

It is not a weakly prime, because it can be changed into another prime (1289362849) 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, 644681024 + 644681025.

It is an arithmetic number, because the mean of its divisors is an integer number (644681025).

Almost surely, 2^1289362049 is an apocalyptic number.

It is an amenable number.

1289362049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1289362049 is an equidigital number, since it uses as much as digits as its factorization.

1289362049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 1289362049 is about 35907.6878815665. The cubic root of 1289362049 is about 1088.4077554620.

The spelling of 1289362049 in words is "one billion, two hundred eighty-nine million, three hundred sixty-two thousand, forty-nine".