195957 has 6 divisors (see below), whose sum is σ = 283062. Its totient is φ = 130632.

The previous prime is 195931. The next prime is 195967. The reversal of 195957 is 759591.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 133956 + 62001 = 366^2 + 249^2 .

It is not a de Polignac number, because 195957 - 2⁶ = 195893 is a prime.

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 195957.

It is not an unprimeable number, because it can be changed into a prime (195907) 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 in 5 ways as a sum of consecutive naturals, for example, 10878 + ... + 10895.

It is an arithmetic number, because the mean of its divisors is an integer number (47177).

2¹⁹⁵⁹⁵⁷ is an apocalyptic number.

It is an amenable number.

195957 is a deficient number, since it is larger than the sum of its proper divisors (87105).

195957 is a wasteful number, since it uses less digits than its factorization.

195957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21779 (or 21776 counting only the distinct ones).

The product of its digits is 14175, while the sum is 36.

The square root of 195957 is about 442.6703062099. The cubic root of 195957 is about 58.0836091034.

It can be divided in two parts, 1959 and 57, that added together give a triangular number (2016 = T₆₃).

The spelling of 195957 in words is "one hundred ninety-five thousand, nine hundred fifty-seven".