195887 has 2 divisors, whose sum is σ = 195888. Its totient is φ = 195886.

The previous prime is 195883. The next prime is 195893. The reversal of 195887 is 788591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 195887 - 2² = 195883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 195887.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 195887.

It is not a weakly prime, because it can be changed into another prime (195883) 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, 97943 + 97944.

It is an arithmetic number, because the mean of its divisors is an integer number (97944).

2¹⁹⁵⁸⁸⁷ is an apocalyptic number.

195887 is a deficient number, since it is larger than the sum of its proper divisors (1).

195887 is an equidigital number, since it uses as much as digits as its factorization.

195887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 38.

The square root of 195887 is about 442.5912335327. The cubic root of 195887 is about 58.0766920470.

Subtracting 195887 from its reverse (788591), we obtain a cube (592704 = 84³).

The spelling of 195887 in words is "one hundred ninety-five thousand, eight hundred eighty-seven".