195641843 has 2 divisors, whose sum is σ = 195641844. Its totient is φ = 195641842.

The previous prime is 195641839. The next prime is 195641851. The reversal of 195641843 is 348146591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 195641843 - 2² = 195641839 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 195641843.

It is not a weakly prime, because it can be changed into another prime (195641833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97820921 + 97820922.

It is an arithmetic number, because the mean of its divisors is an integer number (97820922).

Almost surely, 2^195641843 is an apocalyptic number.

195641843 is a deficient number, since it is larger than the sum of its proper divisors (1).

195641843 is an equidigital number, since it uses as much as digits as its factorization.

195641843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 41.

The square root of 195641843 is about 13987.2028297298. The cubic root of 195641843 is about 580.5245383583.

The spelling of 195641843 in words is "one hundred ninety-five million, six hundred forty-one thousand, eight hundred forty-three".