12947371138 has 8 divisors (see below), whose sum is σ = 20914984188. Its totient is φ = 5975709744.

The previous prime is 12947371121. The next prime is 12947371147. The reversal of 12947371138 is 83117374921.

It can be written as a sum of positive squares in 2 ways, for example, as 11587015449 + 1360355689 = 107643^2 + 36883^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248987881 + ... + 248987932.

Almost surely, 2^12947371138 is an apocalyptic number.

12947371138 is a deficient number, since it is larger than the sum of its proper divisors (7967613050).

12947371138 is a wasteful number, since it uses less digits than its factorization.

12947371138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497975828.

The product of its digits is 254016, while the sum is 46.

The spelling of 12947371138 in words is "twelve billion, nine hundred forty-seven million, three hundred seventy-one thousand, one hundred thirty-eight".