1317112787 has 2 divisors, whose sum is σ = 1317112788. Its totient is φ = 1317112786.

The previous prime is 1317112777. The next prime is 1317112817. The reversal of 1317112787 is 7872117131.

It is a weak prime.

It is an emirp because it is prime and its reverse (7872117131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1317112787 - 2²⁴ = 1300335571 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1317112787.

It is not a weakly prime, because it can be changed into another prime (1317112777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658556393 + 658556394.

It is an arithmetic number, because the mean of its divisors is an integer number (658556394).

Almost surely, 2^1317112787 is an apocalyptic number.

1317112787 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317112787 is an equidigital number, since it uses as much as digits as its factorization.

1317112787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16464, while the sum is 38.

The square root of 1317112787 is about 36292.0485368352. The cubic root of 1317112787 is about 1096.1609385358.

The spelling of 1317112787 in words is "one billion, three hundred seventeen million, one hundred twelve thousand, seven hundred eighty-seven".