13423397329891 has 2 divisors, whose sum is σ = 13423397329892. Its totient is φ = 13423397329890.

The previous prime is 13423397329889. The next prime is 13423397329919. The reversal of 13423397329891 is 19892379332431.

13423397329891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13423397329891 - 2¹ = 13423397329889 is a prime.

It is a super-2 number, since 2×13423397329891² (a number of 27 digits) contains 22 as substring.

Together with 13423397329889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13423397329831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6711698664945 + 6711698664946.

It is an arithmetic number, because the mean of its divisors is an integer number (6711698664946).

Almost surely, 2^{13423397329891} is an apocalyptic number.

13423397329891 is a deficient number, since it is larger than the sum of its proper divisors (1).

13423397329891 is an equidigital number, since it uses as much as digits as its factorization.

13423397329891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52907904, while the sum is 64.

The spelling of 13423397329891 in words is "thirteen trillion, four hundred twenty-three billion, three hundred ninety-seven million, three hundred twenty-nine thousand, eight hundred ninety-one".