189420017 has 2 divisors, whose sum is σ = 189420018. Its totient is φ = 189420016.

The previous prime is 189419999. The next prime is 189420037. The reversal of 189420017 is 710024981.

189420017 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 can be written as a sum of positive squares in only one way, i.e., 152744881 + 36675136 = 12359^2 + 6056^2 .

It is an emirp because it is prime and its reverse (710024981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189420017 - 2⁶ = 189419953 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (189420037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94710008 + 94710009.

It is an arithmetic number, because the mean of its divisors is an integer number (94710009).

Almost surely, 2^189420017 is an apocalyptic number.

It is an amenable number.

189420017 is a deficient number, since it is larger than the sum of its proper divisors (1).

189420017 is an equidigital number, since it uses as much as digits as its factorization.

189420017 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 32.

The square root of 189420017 is about 13762.9944779470. The cubic root of 189420017 is about 574.3041533333.

Adding to 189420017 its reverse (710024981), we get a palindrome (899444998).

The spelling of 189420017 in words is "one hundred eighty-nine million, four hundred twenty thousand, seventeen".