1306989863 has 2 divisors, whose sum is σ = 1306989864. Its totient is φ = 1306989862.

The previous prime is 1306989857. The next prime is 1306989941. The reversal of 1306989863 is 3689896031.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1306989863 - 2¹² = 1306985767 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1306989833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653494931 + 653494932.

It is an arithmetic number, because the mean of its divisors is an integer number (653494932).

Almost surely, 2^1306989863 is an apocalyptic number.

1306989863 is a deficient number, since it is larger than the sum of its proper divisors (1).

1306989863 is an equidigital number, since it uses as much as digits as its factorization.

1306989863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1679616, while the sum is 53.

The square root of 1306989863 is about 36152.3147668306. The cubic root of 1306989863 is about 1093.3454612001.

The spelling of 1306989863 in words is "one billion, three hundred six million, nine hundred eighty-nine thousand, eight hundred sixty-three".