195443945 has 4 divisors (see below), whose sum is σ = 234532740. Its totient is φ = 156355152.

The previous prime is 195443929. The next prime is 195443957. The reversal of 195443945 is 549344591.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 100420441 + 95023504 = 10021^2 + 9748^2 .

It is a cyclic number.

It is not a de Polignac number, because 195443945 - 2⁴ = 195443929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 195443896 and 195443905.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19544390 + ... + 19544399.

It is an arithmetic number, because the mean of its divisors is an integer number (58633185).

Almost surely, 2^195443945 is an apocalyptic number.

It is an amenable number.

195443945 is a deficient number, since it is larger than the sum of its proper divisors (39088795).

195443945 is an equidigital number, since it uses as much as digits as its factorization.

195443945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39088794.

The product of its digits is 388800, while the sum is 44.

The square root of 195443945 is about 13980.1267876940. The cubic root of 195443945 is about 580.3287325913.

The spelling of 195443945 in words is "one hundred ninety-five million, four hundred forty-three thousand, nine hundred forty-five".