13031019691 has 2 divisors, whose sum is σ = 13031019692. Its totient is φ = 13031019690.

The previous prime is 13031019499. The next prime is 13031019739. The reversal of 13031019691 is 19691013031.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13031019691 - 2³¹ = 10883536043 is a prime.

It is not a weakly prime, because it can be changed into another prime (13031019191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6515509845 + 6515509846.

It is an arithmetic number, because the mean of its divisors is an integer number (6515509846).

Almost surely, 2^13031019691 is an apocalyptic number.

13031019691 is a deficient number, since it is larger than the sum of its proper divisors (1).

13031019691 is an equidigital number, since it uses as much as digits as its factorization.

13031019691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 34.

The spelling of 13031019691 in words is "thirteen billion, thirty-one million, nineteen thousand, six hundred ninety-one".