190394189 has 2 divisors, whose sum is σ = 190394190. Its totient is φ = 190394188.

The previous prime is 190394173. The next prime is 190394213. The reversal of 190394189 is 981493091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172712164 + 17682025 = 13142^2 + 4205^2 .

It is a cyclic number.

It is not a de Polignac number, because 190394189 - 2⁴ = 190394173 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190394129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95197094 + 95197095.

It is an arithmetic number, because the mean of its divisors is an integer number (95197095).

Almost surely, 2^190394189 is an apocalyptic number.

It is an amenable number.

190394189 is a deficient number, since it is larger than the sum of its proper divisors (1).

190394189 is an equidigital number, since it uses as much as digits as its factorization.

190394189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 190394189 is about 13798.3400813286. The cubic root of 190394189 is about 575.2870037919.

The spelling of 190394189 in words is "one hundred ninety million, three hundred ninety-four thousand, one hundred eighty-nine".