195323979 has 4 divisors (see below), whose sum is σ = 260431976. Its totient is φ = 130215984.

The previous prime is 195323969. The next prime is 195323987. The reversal of 195323979 is 979323591.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 195323979 - 2¹⁵ = 195291211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195323969) 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, 32553994 + ... + 32553999.

It is an arithmetic number, because the mean of its divisors is an integer number (65107994).

Almost surely, 2^195323979 is an apocalyptic number.

195323979 is a deficient number, since it is larger than the sum of its proper divisors (65107997).

195323979 is an equidigital number, since it uses as much as digits as its factorization.

195323979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65107996.

The product of its digits is 459270, while the sum is 48.

The square root of 195323979 is about 13975.8355385286. The cubic root of 195323979 is about 580.2099705492.

The spelling of 195323979 in words is "one hundred ninety-five million, three hundred twenty-three thousand, nine hundred seventy-nine".