195961 has 4 divisors (see below), whose sum is σ = 197632. Its totient is φ = 194292.

The previous prime is 195931. The next prime is 195967. The reversal of 195961 is 169591.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 195961 - 2⁵ = 195929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195967) 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 3 ways as a sum of consecutive naturals, for example, 645 + ... + 898.

It is an arithmetic number, because the mean of its divisors is an integer number (49408).

2¹⁹⁵⁹⁶¹ is an apocalyptic number.

It is an amenable number.

195961 is a deficient number, since it is larger than the sum of its proper divisors (1671).

195961 is a wasteful number, since it uses less digits than its factorization.

195961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670.

The product of its digits is 2430, while the sum is 31.

The square root of 195961 is about 442.6748242220. The cubic root of 195961 is about 58.0840043140.

Multiplying 195961 by its product of digits (2430), we get a triangular number (476185230 = T₃₀₈₆₀).

It can be divided in two parts, 195 and 961, that added together give a square (1156 = 34²).

The spelling of 195961 in words is "one hundred ninety-five thousand, nine hundred sixty-one".