1317788345 has 8 divisors (see below), whose sum is σ = 1588313664. Its totient is φ = 1049585584.

The previous prime is 1317788327. The next prime is 1317788383. The reversal of 1317788345 is 5438877131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1317788345 - 2⁸ = 1317788089 is a prime.

It is a super-2 number, since 2×1317788345² = 3473132244435678050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1317788345.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 579389 + ... + 581658.

It is an arithmetic number, because the mean of its divisors is an integer number (198539208).

Almost surely, 2^1317788345 is an apocalyptic number.

It is an amenable number.

1317788345 is a deficient number, since it is larger than the sum of its proper divisors (270525319).

1317788345 is a wasteful number, since it uses less digits than its factorization.

1317788345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161279.

The product of its digits is 564480, while the sum is 47.

The square root of 1317788345 is about 36301.3545890508. The cubic root of 1317788345 is about 1096.3483164957.

The spelling of 1317788345 in words is "one billion, three hundred seventeen million, seven hundred eighty-eight thousand, three hundred forty-five".