3111988931 has 2 divisors, whose sum is σ = 3111988932. Its totient is φ = 3111988930.

The previous prime is 3111988889. The next prime is 3111988937. The reversal of 3111988931 is 1398891113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3111988931 - 2²⁶ = 3044880067 is a prime.

It is a super-2 number, since 2×3111988931² = 19368950213333045522, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (3111988937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1555994465 + 1555994466.

It is an arithmetic number, because the mean of its divisors is an integer number (1555994466).

Almost surely, 2^3111988931 is an apocalyptic number.

3111988931 is a deficient number, since it is larger than the sum of its proper divisors (1).

3111988931 is an equidigital number, since it uses as much as digits as its factorization.

3111988931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 44.

The square root of 3111988931 is about 55785.2035131181. The cubic root of 3111988931 is about 1459.9770014204.

The spelling of 3111988931 in words is "three billion, one hundred eleven million, nine hundred eighty-eight thousand, nine hundred thirty-one".