1309664957 has 2 divisors, whose sum is σ = 1309664958. Its totient is φ = 1309664956.

The previous prime is 1309664933. The next prime is 1309664963. The reversal of 1309664957 is 7594669031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1298449156 + 11215801 = 36034^2 + 3349^2 .

It is a cyclic number.

It is not a de Polignac number, because 1309664957 - 2⁶ = 1309664893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1309664557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 654832478 + 654832479.

It is an arithmetic number, because the mean of its divisors is an integer number (654832479).

Almost surely, 2^1309664957 is an apocalyptic number.

It is an amenable number.

1309664957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1309664957 is an equidigital number, since it uses as much as digits as its factorization.

1309664957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1224720, while the sum is 50.

The square root of 1309664957 is about 36189.2934028837. The cubic root of 1309664957 is about 1094.0908912850.

The spelling of 1309664957 in words is "one billion, three hundred nine million, six hundred sixty-four thousand, nine hundred fifty-seven".