195942161 has 4 divisors (see below), whose sum is σ = 196012032. Its totient is φ = 195872292.

The previous prime is 195942151. The next prime is 195942209. The reversal of 195942161 is 161249591.

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 a de Polignac number, because none of the positive numbers 2^k-195942161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195942151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30545 + ... + 36398.

It is an arithmetic number, because the mean of its divisors is an integer number (49003008).

Almost surely, 2^195942161 is an apocalyptic number.

It is an amenable number.

195942161 is a deficient number, since it is larger than the sum of its proper divisors (69871).

195942161 is an equidigital number, since it uses as much as digits as its factorization.

195942161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69870.

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

The square root of 195942161 is about 13997.9341690122. The cubic root of 195942161 is about 580.8214292387.

The spelling of 195942161 in words is "one hundred ninety-five million, nine hundred forty-two thousand, one hundred sixty-one".