12791938 has 4 divisors (see below), whose sum is σ = 19187910. Its totient is φ = 6395968.

The previous prime is 12791893. The next prime is 12791951. The reversal of 12791938 is 83919721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83919721 = 139 ⋅603739.

It can be written as a sum of positive squares in only one way, i.e., 11135569 + 1656369 = 3337^2 + 1287^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12791938.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3197983 + ... + 3197986.

Almost surely, 2^12791938 is an apocalyptic number.

12791938 is a deficient number, since it is larger than the sum of its proper divisors (6395972).

12791938 is an equidigital number, since it uses as much as digits as its factorization.

12791938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6395971.

The product of its digits is 27216, while the sum is 40.

The square root of 12791938 is about 3576.5818877806. The cubic root of 12791938 is about 233.8722974280.

The spelling of 12791938 in words is "twelve million, seven hundred ninety-one thousand, nine hundred thirty-eight".