190809211 has 2 divisors, whose sum is σ = 190809212. Its totient is φ = 190809210.

The previous prime is 190809197. The next prime is 190809217. The reversal of 190809211 is 112908091.

It is a strong prime.

It is an emirp because it is prime and its reverse (112908091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 190809211 - 2¹¹ = 190807163 is a prime.

It is not a weakly prime, because it can be changed into another prime (190809217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95404605 + 95404606.

It is an arithmetic number, because the mean of its divisors is an integer number (95404606).

Almost surely, 2^190809211 is an apocalyptic number.

190809211 is a deficient number, since it is larger than the sum of its proper divisors (1).

190809211 is an equidigital number, since it uses as much as digits as its factorization.

190809211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 190809211 is about 13813.3707327357. The cubic root of 190809211 is about 575.7047047258.

The spelling of 190809211 in words is "one hundred ninety million, eight hundred nine thousand, two hundred eleven".