195939 has 20 divisors (see below), whose sum is σ = 304920. Its totient is φ = 125280.

The previous prime is 195931. The next prime is 195967. The reversal of 195939 is 939591.

It is not a de Polignac number, because 195939 - 2³ = 195931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (195931) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3292 + ... + 3350.

It is an arithmetic number, because the mean of its divisors is an integer number (15246).

2¹⁹⁵⁹³⁹ is an apocalyptic number.

195939 is a deficient number, since it is larger than the sum of its proper divisors (108981).

195939 is an equidigital number, since it uses as much as digits as its factorization.

195939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 103 counting only the distinct ones).

The product of its digits is 10935, while the sum is 36.

The square root of 195939 is about 442.6499745849. The cubic root of 195939 is about 58.0818305891.

The spelling of 195939 in words is "one hundred ninety-five thousand, nine hundred thirty-nine".