3113131913 has 2 divisors, whose sum is σ = 3113131914. Its totient is φ = 3113131912.

The previous prime is 3113131909. The next prime is 3113132047. The reversal of 3113131913 is 3191313113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2962407184 + 150724729 = 54428^2 + 12277^2 .

It is a cyclic number.

It is not a de Polignac number, because 3113131913 - 2² = 3113131909 is a prime.

It is not a weakly prime, because it can be changed into another prime (3113131313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1556565956 + 1556565957.

It is an arithmetic number, because the mean of its divisors is an integer number (1556565957).

Almost surely, 2^3113131913 is an apocalyptic number.

It is an amenable number.

3113131913 is a deficient number, since it is larger than the sum of its proper divisors (1).

3113131913 is an equidigital number, since it uses as much as digits as its factorization.

3113131913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 729, while the sum is 26.

The square root of 3113131913 is about 55795.4470633581. The cubic root of 3113131913 is about 1460.1557213337.

The spelling of 3113131913 in words is "three billion, one hundred thirteen million, one hundred thirty-one thousand, nine hundred thirteen".