1317380657 has 2 divisors, whose sum is σ = 1317380658. Its totient is φ = 1317380656.

The previous prime is 1317380627. The next prime is 1317380689. The reversal of 1317380657 is 7560837131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1088736016 + 228644641 = 32996^2 + 15121^2 .

It is a cyclic number.

It is not a de Polignac number, because 1317380657 - 2¹⁰ = 1317379633 is a prime.

It is not a weakly prime, because it can be changed into another prime (1317380627) 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, 658690328 + 658690329.

It is an arithmetic number, because the mean of its divisors is an integer number (658690329).

Almost surely, 2^1317380657 is an apocalyptic number.

It is an amenable number.

1317380657 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317380657 is an equidigital number, since it uses as much as digits as its factorization.

1317380657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 1317380657 is about 36295.7388270304. The cubic root of 1317380657 is about 1096.2352446823.

The spelling of 1317380657 in words is "one billion, three hundred seventeen million, three hundred eighty thousand, six hundred fifty-seven".