1317832309 has 4 divisors (see below), whose sum is σ = 1348479616. Its totient is φ = 1287185004.

The previous prime is 1317832283. The next prime is 1317832331. The reversal of 1317832309 is 9032387131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9032387131 = 107 ⋅84414833.

It is a cyclic number.

It is not a de Polignac number, because 1317832309 - 2⁵ = 1317832277 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 (1317832379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15323589 + ... + 15323674.

It is an arithmetic number, because the mean of its divisors is an integer number (337119904).

Almost surely, 2^1317832309 is an apocalyptic number.

It is an amenable number.

1317832309 is a deficient number, since it is larger than the sum of its proper divisors (30647307).

1317832309 is an equidigital number, since it uses as much as digits as its factorization.

1317832309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30647306.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 1317832309 is about 36301.9601261419. The cubic root of 1317832309 is about 1096.3605084691.

The spelling of 1317832309 in words is "one billion, three hundred seventeen million, eight hundred thirty-two thousand, three hundred nine".