1313131109 has 2 divisors, whose sum is σ = 1313131110. Its totient is φ = 1313131108.

The previous prime is 1313131087. The next prime is 1313131117. The reversal of 1313131109 is 9011313131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 742399009 + 570732100 = 27247^2 + 23890^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313131109 - 2²⁸ = 1044695653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313131129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656565554 + 656565555.

It is an arithmetic number, because the mean of its divisors is an integer number (656565555).

Almost surely, 2^1313131109 is an apocalyptic number.

It is an amenable number.

1313131109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313131109 is an equidigital number, since it uses as much as digits as its factorization.

1313131109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243, while the sum is 23.

The square root of 1313131109 is about 36237.1509503714. The cubic root of 1313131109 is about 1095.0552459912.

The spelling of 1313131109 in words is "one billion, three hundred thirteen million, one hundred thirty-one thousand, one hundred nine".