1317957899 has 2 divisors, whose sum is σ = 1317957900. Its totient is φ = 1317957898.

The previous prime is 1317957881. The next prime is 1317957911. The reversal of 1317957899 is 9987597131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1317957899 is a prime.

It is not a weakly prime, because it can be changed into another prime (1317954899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658978949 + 658978950.

It is an arithmetic number, because the mean of its divisors is an integer number (658978950).

Almost surely, 2^1317957899 is an apocalyptic number.

1317957899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317957899 is an equidigital number, since it uses as much as digits as its factorization.

1317957899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4286520, while the sum is 59.

The square root of 1317957899 is about 36303.6898813330. The cubic root of 1317957899 is about 1096.3953352427.

The spelling of 1317957899 in words is "one billion, three hundred seventeen million, nine hundred fifty-seven thousand, eight hundred ninety-nine".