195659 has 2 divisors, whose sum is σ = 195660. Its totient is φ = 195658.

The previous prime is 195599. The next prime is 195677. The reversal of 195659 is 956591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 195659 - 2¹² = 191563 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 195659.

It is not a weakly prime, because it can be changed into another prime (195259) 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, 97829 + 97830.

It is an arithmetic number, because the mean of its divisors is an integer number (97830).

2¹⁹⁵⁶⁵⁹ is an apocalyptic number.

195659 is a deficient number, since it is larger than the sum of its proper divisors (1).

195659 is an equidigital number, since it uses as much as digits as its factorization.

195659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12150, while the sum is 35.

The square root of 195659 is about 442.3335845264. Note that the first 3 decimals coincide. The cubic root of 195659 is about 58.0541507749.

The spelling of 195659 in words is "one hundred ninety-five thousand, six hundred fifty-nine".