189000871 has 2 divisors, whose sum is σ = 189000872. Its totient is φ = 189000870.

The previous prime is 189000817. The next prime is 189000887. The reversal of 189000871 is 178000981.

Together with previous prime (189000817) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (178000981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189000871 - 2¹⁵ = 188968103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189006871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94500435 + 94500436.

It is an arithmetic number, because the mean of its divisors is an integer number (94500436).

Almost surely, 2^189000871 is an apocalyptic number.

189000871 is a deficient number, since it is larger than the sum of its proper divisors (1).

189000871 is an equidigital number, since it uses as much as digits as its factorization.

189000871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 34.

The square root of 189000871 is about 13747.7587627948. The cubic root of 189000871 is about 573.8802363981.

The spelling of 189000871 in words is "one hundred eighty-nine million, eight hundred seventy-one", and thus it is an aban number.