13797638891 has 2 divisors, whose sum is σ = 13797638892. Its totient is φ = 13797638890.

The previous prime is 13797638873. The next prime is 13797638929. The reversal of 13797638891 is 19883679731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13797638891 - 2²⁶ = 13730530027 is a prime.

It is not a weakly prime, because it can be changed into another prime (13797638831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6898819445 + 6898819446.

It is an arithmetic number, because the mean of its divisors is an integer number (6898819446).

Almost surely, 2^13797638891 is an apocalyptic number.

13797638891 is a deficient number, since it is larger than the sum of its proper divisors (1).

13797638891 is an equidigital number, since it uses as much as digits as its factorization.

13797638891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13716864, while the sum is 62.

The spelling of 13797638891 in words is "thirteen billion, seven hundred ninety-seven million, six hundred thirty-eight thousand, eight hundred ninety-one".