195188839 has 2 divisors, whose sum is σ = 195188840. Its totient is φ = 195188838.

The previous prime is 195188809. The next prime is 195188857. The reversal of 195188839 is 938881591.

195188839 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 195188839 - 2¹³ = 195180647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195188809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97594419 + 97594420.

It is an arithmetic number, because the mean of its divisors is an integer number (97594420).

Almost surely, 2^195188839 is an apocalyptic number.

195188839 is a deficient number, since it is larger than the sum of its proper divisors (1).

195188839 is an equidigital number, since it uses as much as digits as its factorization.

195188839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 52.

The square root of 195188839 is about 13970.9999284232. Note that the first 4 decimals coincide. The cubic root of 195188839 is about 580.0761285328.

The spelling of 195188839 in words is "one hundred ninety-five million, one hundred eighty-eight thousand, eight hundred thirty-nine".