13887212191 has 2 divisors, whose sum is σ = 13887212192. Its totient is φ = 13887212190.

The previous prime is 13887212123. The next prime is 13887212203. The reversal of 13887212191 is 19121278831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13887212191 - 2⁷ = 13887212063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13887212491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6943606095 + 6943606096.

It is an arithmetic number, because the mean of its divisors is an integer number (6943606096).

Almost surely, 2^13887212191 is an apocalyptic number.

13887212191 is a deficient number, since it is larger than the sum of its proper divisors (1).

13887212191 is an equidigital number, since it uses as much as digits as its factorization.

13887212191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 43.

The spelling of 13887212191 in words is "thirteen billion, eight hundred eighty-seven million, two hundred twelve thousand, one hundred ninety-one".