195236891 has 8 divisors (see below), whose sum is σ = 207093744. Its totient is φ = 183421440.

The previous prime is 195236851. The next prime is 195236929. The reversal of 195236891 is 198632591.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 195236891 - 2²⁶ = 128128027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195236831) 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 7 ways as a sum of consecutive naturals, for example, 350 + ... + 19763.

It is an arithmetic number, because the mean of its divisors is an integer number (25886718).

Almost surely, 2^195236891 is an apocalyptic number.

195236891 is a deficient number, since it is larger than the sum of its proper divisors (11856853).

195236891 is a wasteful number, since it uses less digits than its factorization.

195236891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20701.

The product of its digits is 116640, while the sum is 44.

The square root of 195236891 is about 13972.7195277083. The cubic root of 195236891 is about 580.1237260820.

The spelling of 195236891 in words is "one hundred ninety-five million, two hundred thirty-six thousand, eight hundred ninety-one".