195791039 has 4 divisors (see below), whose sum is σ = 195819456. Its totient is φ = 195762624.

The previous prime is 195791033. The next prime is 195791069. The reversal of 195791039 is 930197591.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 195791039 - 2⁸ = 195790783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195791033) 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 3 ways as a sum of consecutive naturals, for example, 3407 + ... + 20079.

It is an arithmetic number, because the mean of its divisors is an integer number (48954864).

Almost surely, 2^195791039 is an apocalyptic number.

195791039 is a deficient number, since it is larger than the sum of its proper divisors (28417).

195791039 is a wasteful number, since it uses less digits than its factorization.

195791039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28416.

The product of its (nonzero) digits is 76545, while the sum is 44.

The square root of 195791039 is about 13992.5351169829. The cubic root of 195791039 is about 580.6720697356.

The spelling of 195791039 in words is "one hundred ninety-five million, seven hundred ninety-one thousand, thirty-nine".