6938813131931 has 2 divisors, whose sum is σ = 6938813131932. Its totient is φ = 6938813131930.

The previous prime is 6938813131867. The next prime is 6938813131951. The reversal of 6938813131931 is 1391313188396.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6938813131931 - 2⁶ = 6938813131867 is a prime.

It is a super-2 number, since 2×6938813131931² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6938813131951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3469406565965 + 3469406565966.

It is an arithmetic number, because the mean of its divisors is an integer number (3469406565966).

Almost surely, 2^{6938813131931} is an apocalyptic number.

6938813131931 is a deficient number, since it is larger than the sum of its proper divisors (1).

6938813131931 is an equidigital number, since it uses as much as digits as its factorization.

6938813131931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2519424, while the sum is 56.

The spelling of 6938813131931 in words is "six trillion, nine hundred thirty-eight billion, eight hundred thirteen million, one hundred thirty-one thousand, nine hundred thirty-one".