13127891291 has 2 divisors, whose sum is σ = 13127891292. Its totient is φ = 13127891290.

The previous prime is 13127891251. The next prime is 13127891323. The reversal of 13127891291 is 19219872131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13127891291 - 2²² = 13123696987 is a prime.

It is not a weakly prime, because it can be changed into another prime (13127891251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6563945645 + 6563945646.

It is an arithmetic number, because the mean of its divisors is an integer number (6563945646).

Almost surely, 2^13127891291 is an apocalyptic number.

13127891291 is a deficient number, since it is larger than the sum of its proper divisors (1).

13127891291 is an equidigital number, since it uses as much as digits as its factorization.

13127891291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 44.

The spelling of 13127891291 in words is "thirteen billion, one hundred twenty-seven million, eight hundred ninety-one thousand, two hundred ninety-one".