12389915317 has 8 divisors (see below), whose sum is σ = 13398354200. Its totient is φ = 11389386240.

The previous prime is 12389915261. The next prime is 12389915327. The reversal of 12389915317 is 71351998321.

It can be written as a sum of positive squares in 4 ways, for example, as 167728401 + 12222186916 = 12951^2 + 110554^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12389915317 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 (12389915327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1974192 + ... + 1980457.

It is an arithmetic number, because the mean of its divisors is an integer number (1674794275).

Almost surely, 2^12389915317 is an apocalyptic number.

It is an amenable number.

12389915317 is a deficient number, since it is larger than the sum of its proper divisors (1008438883).

12389915317 is a wasteful number, since it uses less digits than its factorization.

12389915317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3954903.

The product of its digits is 408240, while the sum is 49.

The spelling of 12389915317 in words is "twelve billion, three hundred eighty-nine million, nine hundred fifteen thousand, three hundred seventeen".