3113809891 has 2 divisors, whose sum is σ = 3113809892. Its totient is φ = 3113809890.

The previous prime is 3113809877. The next prime is 3113809939. The reversal of 3113809891 is 1989083113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3113809891 - 2⁵ = 3113809859 is a prime.

It is not a weakly prime, because it can be changed into another prime (3113809841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1556904945 + 1556904946.

It is an arithmetic number, because the mean of its divisors is an integer number (1556904946).

Almost surely, 2^3113809891 is an apocalyptic number.

3113809891 is a deficient number, since it is larger than the sum of its proper divisors (1).

3113809891 is an equidigital number, since it uses as much as digits as its factorization.

3113809891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 3113809891 is about 55801.5223000233. The cubic root of 3113809891 is about 1460.2617112316.

The spelling of 3113809891 in words is "three billion, one hundred thirteen million, eight hundred nine thousand, eight hundred ninety-one".