1317662393 has 2 divisors, whose sum is σ = 1317662394. Its totient is φ = 1317662392.

The previous prime is 1317662383. The next prime is 1317662441. The reversal of 1317662393 is 3932667131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1285365904 + 32296489 = 35852^2 + 5683^2 .

It is a cyclic number.

It is not a de Polignac number, because 1317662393 - 2⁶ = 1317662329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1317662393.

It is not a weakly prime, because it can be changed into another prime (1317662363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658831196 + 658831197.

It is an arithmetic number, because the mean of its divisors is an integer number (658831197).

Almost surely, 2^1317662393 is an apocalyptic number.

It is an amenable number.

1317662393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317662393 is an equidigital number, since it uses as much as digits as its factorization.

1317662393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 41.

The square root of 1317662393 is about 36299.6197363003. The cubic root of 1317662393 is about 1096.3133863384.

The spelling of 1317662393 in words is "one billion, three hundred seventeen million, six hundred sixty-two thousand, three hundred ninety-three".