195643141 has 2 divisors, whose sum is σ = 195643142. Its totient is φ = 195643140.

The previous prime is 195643121. The next prime is 195643169. The reversal of 195643141 is 141346591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171348100 + 24295041 = 13090^2 + 4929^2 .

It is a cyclic number.

It is not a de Polignac number, because 195643141 - 2¹⁷ = 195512069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 195643097 and 195643106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195643121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97821570 + 97821571.

It is an arithmetic number, because the mean of its divisors is an integer number (97821571).

Almost surely, 2^195643141 is an apocalyptic number.

It is an amenable number.

195643141 is a deficient number, since it is larger than the sum of its proper divisors (1).

195643141 is an equidigital number, since it uses as much as digits as its factorization.

195643141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 34.

The square root of 195643141 is about 13987.2492292087. The cubic root of 195643141 is about 580.5258221995.

The spelling of 195643141 in words is "one hundred ninety-five million, six hundred forty-three thousand, one hundred forty-one".