190811 has 2 divisors, whose sum is σ = 190812. Its totient is φ = 190810.

The previous prime is 190807. The next prime is 190823. The reversal of 190811 is 118091.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 190811 - 2² = 190807 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (190871) 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, 95405 + 95406.

It is an arithmetic number, because the mean of its divisors is an integer number (95406).

2¹⁹⁰⁸¹¹ is an apocalyptic number.

190811 is a deficient number, since it is larger than the sum of its proper divisors (1).

190811 is an equidigital number, since it uses as much as digits as its factorization.

190811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 190811 is about 436.8191845604. The cubic root of 190811 is about 57.5706503962.

It can be divided in two parts, 190 and 811, that added together give a palindrome (1001).

The spelling of 190811 in words is "one hundred ninety thousand, eight hundred eleven".