1306686961 has 2 divisors, whose sum is σ = 1306686962. Its totient is φ = 1306686960.

The previous prime is 1306686949. The next prime is 1306686989. The reversal of 1306686961 is 1696866031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 885657600 + 421029361 = 29760^2 + 20519^2 .

It is a cyclic number.

It is not a de Polignac number, because 1306686961 - 2¹¹ = 1306684913 is a prime.

It is not a weakly prime, because it can be changed into another prime (1306686761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653343480 + 653343481.

It is an arithmetic number, because the mean of its divisors is an integer number (653343481).

Almost surely, 2^1306686961 is an apocalyptic number.

It is an amenable number.

1306686961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1306686961 is an equidigital number, since it uses as much as digits as its factorization.

1306686961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 1306686961 is about 36148.1252764234. The cubic root of 1306686961 is about 1093.2609917578.

The spelling of 1306686961 in words is "one billion, three hundred six million, six hundred eighty-six thousand, nine hundred sixty-one".