1317194657 has 2 divisors, whose sum is σ = 1317194658. Its totient is φ = 1317194656.

The previous prime is 1317194633. The next prime is 1317194689. The reversal of 1317194657 is 7564917131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1118835601 + 198359056 = 33449^2 + 14084^2 .

It is a cyclic number.

It is not a de Polignac number, because 1317194657 - 2²⁰ = 1316146081 is a prime.

It is not a weakly prime, because it can be changed into another prime (1317194617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658597328 + 658597329.

It is an arithmetic number, because the mean of its divisors is an integer number (658597329).

Almost surely, 2^1317194657 is an apocalyptic number.

It is an amenable number.

1317194657 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317194657 is an equidigital number, since it uses as much as digits as its factorization.

1317194657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 44.

The square root of 1317194657 is about 36293.1764523305. The cubic root of 1317194657 is about 1096.1836500397.

The spelling of 1317194657 in words is "one billion, three hundred seventeen million, one hundred ninety-four thousand, six hundred fifty-seven".