12938831 has 2 divisors, whose sum is σ = 12938832. Its totient is φ = 12938830.

The previous prime is 12938813. The next prime is 12938851. The reversal of 12938831 is 13883921.

Together with previous prime (12938813) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (13883921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12938831 - 2⁶ = 12938767 is a prime.

It is a super-2 number, since 2×12938831² = 334826695293122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12938791 and 12938800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12938801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6469415 + 6469416.

It is an arithmetic number, because the mean of its divisors is an integer number (6469416).

Almost surely, 2^12938831 is an apocalyptic number.

12938831 is a deficient number, since it is larger than the sum of its proper divisors (1).

12938831 is an equidigital number, since it uses as much as digits as its factorization.

12938831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 35.

The square root of 12938831 is about 3597.0586595161. The cubic root of 12938831 is about 234.7640970559.

The spelling of 12938831 in words is "twelve million, nine hundred thirty-eight thousand, eight hundred thirty-one".