195091445 has 4 divisors (see below), whose sum is σ = 234109740. Its totient is φ = 156073152.

The previous prime is 195091433. The next prime is 195091447. The reversal of 195091445 is 544190591.

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 83429956 + 111661489 = 9134^2 + 10567^2 .

It is a cyclic number.

It is not a de Polignac number, because 195091445 - 2⁸ = 195091189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 195091399 and 195091408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195091447) 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 in 3 ways as a sum of consecutive naturals, for example, 19509140 + ... + 19509149.

It is an arithmetic number, because the mean of its divisors is an integer number (58527435).

Almost surely, 2^195091445 is an apocalyptic number.

It is an amenable number.

195091445 is a deficient number, since it is larger than the sum of its proper divisors (39018295).

195091445 is an equidigital number, since it uses as much as digits as its factorization.

195091445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39018294.

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 195091445 is about 13967.5139162272. The cubic root of 195091445 is about 579.9796316668.

The spelling of 195091445 in words is "one hundred ninety-five million, ninety-one thousand, four hundred forty-five".