189407681171 has 2 divisors, whose sum is σ = 189407681172. Its totient is φ = 189407681170.

The previous prime is 189407681153. The next prime is 189407681209. The reversal of 189407681171 is 171186704981.

189407681171 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 an emirp because it is prime and its reverse (171186704981) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189407681171 is a prime.

It is not a weakly prime, because it can be changed into another prime (189407681101) 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, 94703840585 + 94703840586.

It is an arithmetic number, because the mean of its divisors is an integer number (94703840586).

Almost surely, 2^189407681171 is an apocalyptic number.

189407681171 is a deficient number, since it is larger than the sum of its proper divisors (1).

189407681171 is an equidigital number, since it uses as much as digits as its factorization.

189407681171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 677376, while the sum is 53.

The spelling of 189407681171 in words is "one hundred eighty-nine billion, four hundred seven million, six hundred eighty-one thousand, one hundred seventy-one".