189170447 has 2 divisors, whose sum is σ = 189170448. Its totient is φ = 189170446.

The previous prime is 189170389. The next prime is 189170533. The reversal of 189170447 is 744071981.

It is a weak prime.

It is an emirp because it is prime and its reverse (744071981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189170447 - 2¹⁰ = 189169423 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189170647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94585223 + 94585224.

It is an arithmetic number, because the mean of its divisors is an integer number (94585224).

Almost surely, 2^189170447 is an apocalyptic number.

189170447 is a deficient number, since it is larger than the sum of its proper divisors (1).

189170447 is an equidigital number, since it uses as much as digits as its factorization.

189170447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 189170447 is about 13753.9247853113. The cubic root of 189170447 is about 574.0518180142.

The spelling of 189170447 in words is "one hundred eighty-nine million, one hundred seventy thousand, four hundred forty-seven".