13238845691 has 2 divisors, whose sum is σ = 13238845692. Its totient is φ = 13238845690.

The previous prime is 13238845687. The next prime is 13238845703. The reversal of 13238845691 is 19654883231.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (19654883231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13238845691 - 2² = 13238845687 is a prime.

It is not a weakly prime, because it can be changed into another prime (13238845601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6619422845 + 6619422846.

It is an arithmetic number, because the mean of its divisors is an integer number (6619422846).

Almost surely, 2^13238845691 is an apocalyptic number.

13238845691 is a deficient number, since it is larger than the sum of its proper divisors (1).

13238845691 is an equidigital number, since it uses as much as digits as its factorization.

13238845691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 50.

The spelling of 13238845691 in words is "thirteen billion, two hundred thirty-eight million, eight hundred forty-five thousand, six hundred ninety-one".