195913839 has 32 divisors (see below), whose sum is σ = 298598400. Its totient is φ = 113099360.

The previous prime is 195913777. The next prime is 195913849. The reversal of 195913839 is 938319591.

It is not a de Polignac number, because 195913839 - 2⁹ = 195913327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195913849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 272122 + ... + 272840.

It is an arithmetic number, because the mean of its divisors is an integer number (9331200).

Almost surely, 2^195913839 is an apocalyptic number.

195913839 is a deficient number, since it is larger than the sum of its proper divisors (102684561).

195913839 is a wasteful number, since it uses less digits than its factorization.

195913839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115.

The product of its digits is 262440, while the sum is 48.

The square root of 195913839 is about 13996.9224831746. The cubic root of 195913839 is about 580.7934434000.

The spelling of 195913839 in words is "one hundred ninety-five million, nine hundred thirteen thousand, eight hundred thirty-nine".