195859943 has 2 divisors, whose sum is σ = 195859944. Its totient is φ = 195859942.

The previous prime is 195859933. The next prime is 195859987. The reversal of 195859943 is 349958591.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 195859943 - 2⁶ = 195859879 is a prime.

It is a super-2 number, since 2×195859943² = 76722234543926498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195859933) 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 as a sum of consecutive naturals, namely, 97929971 + 97929972.

It is an arithmetic number, because the mean of its divisors is an integer number (97929972).

Almost surely, 2^195859943 is an apocalyptic number.

195859943 is a deficient number, since it is larger than the sum of its proper divisors (1).

195859943 is an equidigital number, since it uses as much as digits as its factorization.

195859943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1749600, while the sum is 53.

The square root of 195859943 is about 13994.9970703820. The cubic root of 195859943 is about 580.7401796550.

The spelling of 195859943 in words is "one hundred ninety-five million, eight hundred fifty-nine thousand, nine hundred forty-three".