189420097 has 2 divisors, whose sum is σ = 189420098. Its totient is φ = 189420096.

The previous prime is 189420047. The next prime is 189420151. The reversal of 189420097 is 790024981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179989056 + 9431041 = 13416^2 + 3071^2 .

It is an emirp because it is prime and its reverse (790024981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189420097 - 2¹⁹ = 188895809 is a prime.

It is not a weakly prime, because it can be changed into another prime (189420017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94710048 + 94710049.

It is an arithmetic number, because the mean of its divisors is an integer number (94710049).

Almost surely, 2^189420097 is an apocalyptic number.

It is an amenable number.

189420097 is a deficient number, since it is larger than the sum of its proper divisors (1).

189420097 is an equidigital number, since it uses as much as digits as its factorization.

189420097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 189420097 is about 13762.9973842910. The cubic root of 189420097 is about 574.3042341842.

The spelling of 189420097 in words is "one hundred eighty-nine million, four hundred twenty thousand, ninety-seven".