1317966399 has 6 divisors (see below), whose sum is σ = 1903729256. Its totient is φ = 878644260.

The previous prime is 1317966373. The next prime is 1317966421. The reversal of 1317966399 is 9936697131.

It is not a de Polignac number, because 1317966399 - 2²⁸ = 1049530943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317966319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73220347 + ... + 73220364.

Almost surely, 2^1317966399 is an apocalyptic number.

1317966399 is a deficient number, since it is larger than the sum of its proper divisors (585762857).

1317966399 is a wasteful number, since it uses less digits than its factorization.

1317966399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146440717 (or 146440714 counting only the distinct ones).

The product of its digits is 1653372, while the sum is 54.

The square root of 1317966399 is about 36303.8069491341. The cubic root of 1317966399 is about 1096.3976922579.

The spelling of 1317966399 in words is "one billion, three hundred seventeen million, nine hundred sixty-six thousand, three hundred ninety-nine".