195869 has 2 divisors, whose sum is σ = 195870. Its totient is φ = 195868.

The previous prime is 195863. The next prime is 195883. The reversal of 195869 is 968591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190969 + 4900 = 437^2 + 70^2 .

It is a cyclic number.

It is not a de Polignac number, because 195869 - 2¹² = 191773 is a prime.

It is a super-2 number, since 2×195869² = 76729330322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

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 195869.

It is not a weakly prime, because it can be changed into another prime (195863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97934 + 97935.

It is an arithmetic number, because the mean of its divisors is an integer number (97935).

2¹⁹⁵⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

195869 is a deficient number, since it is larger than the sum of its proper divisors (1).

195869 is an equidigital number, since it uses as much as digits as its factorization.

195869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 38.

The square root of 195869 is about 442.5708982751. The cubic root of 195869 is about 58.0749131090.

The spelling of 195869 in words is "one hundred ninety-five thousand, eight hundred sixty-nine".