1289634713 has 2 divisors, whose sum is σ = 1289634714. Its totient is φ = 1289634712.

The previous prime is 1289634707. The next prime is 1289634757. The reversal of 1289634713 is 3174369821.

It is an a-pointer prime, because the next prime (1289634757) can be obtained adding 1289634713 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1241011984 + 48622729 = 35228^2 + 6973^2 .

It is a cyclic number.

It is not a de Polignac number, because 1289634713 - 2¹⁰ = 1289633689 is a prime.

It is not a weakly prime, because it can be changed into another prime (1289634013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644817356 + 644817357.

It is an arithmetic number, because the mean of its divisors is an integer number (644817357).

Almost surely, 2^1289634713 is an apocalyptic number.

It is an amenable number.

1289634713 is a deficient number, since it is larger than the sum of its proper divisors (1).

1289634713 is an equidigital number, since it uses as much as digits as its factorization.

1289634713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 44.

The square root of 1289634713 is about 35911.4844165484. The cubic root of 1289634713 is about 1088.4844726508.

The spelling of 1289634713 in words is "one billion, two hundred eighty-nine million, six hundred thirty-four thousand, seven hundred thirteen".