13406813291 has 2 divisors, whose sum is σ = 13406813292. Its totient is φ = 13406813290.

The previous prime is 13406813219. The next prime is 13406813389. The reversal of 13406813291 is 19231860431.

Together with previous prime (13406813219) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13406813291 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (13406813201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6703406645 + 6703406646.

It is an arithmetic number, because the mean of its divisors is an integer number (6703406646).

Almost surely, 2^13406813291 is an apocalyptic number.

13406813291 is a deficient number, since it is larger than the sum of its proper divisors (1).

13406813291 is an equidigital number, since it uses as much as digits as its factorization.

13406813291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 13406813291 in words is "thirteen billion, four hundred six million, eight hundred thirteen thousand, two hundred ninety-one".