13373571691 has 2 divisors, whose sum is σ = 13373571692. Its totient is φ = 13373571690.

The previous prime is 13373571661. The next prime is 13373571707. The reversal of 13373571691 is 19617537331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13373571691 - 2⁹ = 13373571179 is a prime.

It is not a weakly prime, because it can be changed into another prime (13373571641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6686785845 + 6686785846.

It is an arithmetic number, because the mean of its divisors is an integer number (6686785846).

Almost surely, 2^13373571691 is an apocalyptic number.

13373571691 is a deficient number, since it is larger than the sum of its proper divisors (1).

13373571691 is an equidigital number, since it uses as much as digits as its factorization.

13373571691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 357210, while the sum is 46.

The spelling of 13373571691 in words is "thirteen billion, three hundred seventy-three million, five hundred seventy-one thousand, six hundred ninety-one".