195895591 has 2 divisors, whose sum is σ = 195895592. Its totient is φ = 195895590.

The previous prime is 195895561. The next prime is 195895621. The reversal of 195895591 is 195598591.

195895591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (195895561) and next prime (195895621).

It is a cyclic number.

It is not a de Polignac number, because 195895591 - 2⁷ = 195895463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195895561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97947795 + 97947796.

It is an arithmetic number, because the mean of its divisors is an integer number (97947796).

Almost surely, 2^195895591 is an apocalyptic number.

195895591 is a deficient number, since it is larger than the sum of its proper divisors (1).

195895591 is an equidigital number, since it uses as much as digits as its factorization.

195895591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 729000, while the sum is 52.

The square root of 195895591 is about 13996.2706104162. The cubic root of 195895591 is about 580.7754105615.

The spelling of 195895591 in words is "one hundred ninety-five million, eight hundred ninety-five thousand, five hundred ninety-one".