195791 has 2 divisors, whose sum is σ = 195792. Its totient is φ = 195790.

The previous prime is 195787. The next prime is 195809. The reversal of 195791 is 197591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 195791 - 2² = 195787 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97895 + 97896.

It is an arithmetic number, because the mean of its divisors is an integer number (97896).

2¹⁹⁵⁷⁹¹ is an apocalyptic number.

195791 is a deficient number, since it is larger than the sum of its proper divisors (1).

195791 is an equidigital number, since it uses as much as digits as its factorization.

195791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2835, while the sum is 32.

The square root of 195791 is about 442.4827680261. The cubic root of 195791 is about 58.0672031181.

It can be divided in two parts, 1957 and 91, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 195791 in words is "one hundred ninety-five thousand, seven hundred ninety-one".