13931623187 has 2 divisors, whose sum is σ = 13931623188. Its totient is φ = 13931623186.

The previous prime is 13931623177. The next prime is 13931623193. The reversal of 13931623187 is 78132613931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13931623187 - 2⁸ = 13931622931 is a prime.

It is not a weakly prime, because it can be changed into another prime (13931623177) 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, 6965811593 + 6965811594.

It is an arithmetic number, because the mean of its divisors is an integer number (6965811594).

Almost surely, 2^13931623187 is an apocalyptic number.

13931623187 is a deficient number, since it is larger than the sum of its proper divisors (1).

13931623187 is an equidigital number, since it uses as much as digits as its factorization.

13931623187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 44.

The spelling of 13931623187 in words is "thirteen billion, nine hundred thirty-one million, six hundred twenty-three thousand, one hundred eighty-seven".