195091947 has 6 divisors (see below), whose sum is σ = 281799492. Its totient is φ = 130061292.

The previous prime is 195091933. The next prime is 195091951. The reversal of 195091947 is 749190591.

It is not a de Polignac number, because 195091947 - 2¹¹ = 195089899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (195091907) 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 5 ways as a sum of consecutive naturals, for example, 10838433 + ... + 10838450.

It is an arithmetic number, because the mean of its divisors is an integer number (46966582).

Almost surely, 2^195091947 is an apocalyptic number.

195091947 is a deficient number, since it is larger than the sum of its proper divisors (86707545).

195091947 is a wasteful number, since it uses less digits than its factorization.

195091947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21676889 (or 21676886 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 45.

The square root of 195091947 is about 13967.5318864859. The cubic root of 195091947 is about 579.9801291250.

The spelling of 195091947 in words is "one hundred ninety-five million, ninety-one thousand, nine hundred forty-seven".