189090047 has 2 divisors, whose sum is σ = 189090048. Its totient is φ = 189090046.

The previous prime is 189090043. The next prime is 189090101. The reversal of 189090047 is 740090981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 189090047 - 2² = 189090043 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189090043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94545023 + 94545024.

It is an arithmetic number, because the mean of its divisors is an integer number (94545024).

Almost surely, 2^189090047 is an apocalyptic number.

189090047 is a deficient number, since it is larger than the sum of its proper divisors (1).

189090047 is an equidigital number, since it uses as much as digits as its factorization.

189090047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 189090047 is about 13751.0016726055. The cubic root of 189090047 is about 573.9704798927.

The spelling of 189090047 in words is "one hundred eighty-nine million, ninety thousand, forty-seven".