13111598309 has 2 divisors, whose sum is σ = 13111598310. Its totient is φ = 13111598308.

The previous prime is 13111598303. The next prime is 13111598333. The reversal of 13111598309 is 90389511131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11256573409 + 1855024900 = 106097^2 + 43070^2 .

It is a cyclic number.

It is not a de Polignac number, because 13111598309 - 2²⁰ = 13110549733 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13111598303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6555799154 + 6555799155.

It is an arithmetic number, because the mean of its divisors is an integer number (6555799155).

Almost surely, 2^13111598309 is an apocalyptic number.

It is an amenable number.

13111598309 is a deficient number, since it is larger than the sum of its proper divisors (1).

13111598309 is an equidigital number, since it uses as much as digits as its factorization.

13111598309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 41.

The spelling of 13111598309 in words is "thirteen billion, one hundred eleven million, five hundred ninety-eight thousand, three hundred nine".