1317365947 has 2 divisors, whose sum is σ = 1317365948. Its totient is φ = 1317365946.

The previous prime is 1317365911. The next prime is 1317366041. The reversal of 1317365947 is 7495637131.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1317365947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1317365897 and 1317365906.

It is not a weakly prime, because it can be changed into another prime (1317365347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658682973 + 658682974.

It is an arithmetic number, because the mean of its divisors is an integer number (658682974).

Almost surely, 2^1317365947 is an apocalyptic number.

1317365947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317365947 is an equidigital number, since it uses as much as digits as its factorization.

1317365947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 46.

The square root of 1317365947 is about 36295.5361855973. The cubic root of 1317365947 is about 1096.2311644441.

The spelling of 1317365947 in words is "one billion, three hundred seventeen million, three hundred sixty-five thousand, nine hundred forty-seven".