195506839 has 12 divisors (see below), whose sum is σ = 215766432. Its totient is φ = 177013760.

The previous prime is 195506833. The next prime is 195506849. The reversal of 195506839 is 938605591.

It is not a de Polignac number, because 195506839 - 2⁷ = 195506711 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 (195506833) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27954 + ... + 34240.

It is an arithmetic number, because the mean of its divisors is an integer number (17980536).

Almost surely, 2^195506839 is an apocalyptic number.

195506839 is a deficient number, since it is larger than the sum of its proper divisors (20259593).

195506839 is a wasteful number, since it uses less digits than its factorization.

195506839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6566 (or 6555 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 46.

The square root of 195506839 is about 13982.3760141115. The cubic root of 195506839 is about 580.3909759810.

The spelling of 195506839 in words is "one hundred ninety-five million, five hundred six thousand, eight hundred thirty-nine".