195599 has 2 divisors, whose sum is σ = 195600. Its totient is φ = 195598.

The previous prime is 195593. The next prime is 195659. The reversal of 195599 is 995591.

It is a weak prime.

It is an emirp because it is prime and its reverse (995591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 195599 - 2⁸ = 195343 is a prime.

It is a Sophie Germain 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 (195593) 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, 97799 + 97800.

It is an arithmetic number, because the mean of its divisors is an integer number (97800).

2¹⁹⁵⁵⁹⁹ is an apocalyptic number.

195599 is a deficient number, since it is larger than the sum of its proper divisors (1).

195599 is an equidigital number, since it uses as much as digits as its factorization.

195599 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18225, while the sum is 38.

The square root of 195599 is about 442.2657572094. The cubic root of 195599 is about 58.0482159509.

The spelling of 195599 in words is "one hundred ninety-five thousand, five hundred ninety-nine".