189000887 has 2 divisors, whose sum is σ = 189000888. Its totient is φ = 189000886.

The previous prime is 189000871. The next prime is 189000899. The reversal of 189000887 is 788000981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 189000887 - 2⁴ = 189000871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189000817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94500443 + 94500444.

It is an arithmetic number, because the mean of its divisors is an integer number (94500444).

Almost surely, 2^189000887 is an apocalyptic number.

189000887 is a deficient number, since it is larger than the sum of its proper divisors (1).

189000887 is an equidigital number, since it uses as much as digits as its factorization.

189000887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 41.

The square root of 189000887 is about 13747.7593447078. The cubic root of 189000887 is about 573.8802525922.

The spelling of 189000887 in words is "one hundred eighty-nine million, eight hundred eighty-seven", and thus it is an aban number.