1317365897 has 2 divisors, whose sum is σ = 1317365898. Its totient is φ = 1317365896.

The previous prime is 1317365891. The next prime is 1317365909. The reversal of 1317365897 is 7985637131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 786017296 + 531348601 = 28036^2 + 23051^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1317365897 is a prime.

It is a super-2 number, since 2×1317365897² = 3470905813157229218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1317365891) 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, 658682948 + 658682949.

It is an arithmetic number, because the mean of its divisors is an integer number (658682949).

Almost surely, 2^1317365897 is an apocalyptic number.

It is an amenable number.

1317365897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317365897 is an equidigital number, since it uses as much as digits as its factorization.

1317365897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 952560, while the sum is 50.

The square root of 1317365897 is about 36295.5354968073. The cubic root of 1317365897 is about 1096.2311505752.

The spelling of 1317365897 in words is "one billion, three hundred seventeen million, three hundred sixty-five thousand, eight hundred ninety-seven".