195109047 has 32 divisors (see below), whose sum is σ = 335961600. Its totient is φ = 109594944.

The previous prime is 195109039. The next prime is 195109091. The reversal of 195109047 is 740901591.

195109047 is a `hidden beast` number, since 19 + 510 + 90 + 47 = 666.

It is not a de Polignac number, because 195109047 - 2³ = 195109039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195109097) 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 in 31 ways as a sum of consecutive naturals, for example, 2403 + ... + 19899.

It is an arithmetic number, because the mean of its divisors is an integer number (10498800).

Almost surely, 2^195109047 is an apocalyptic number.

195109047 is a deficient number, since it is larger than the sum of its proper divisors (140852553).

195109047 is a wasteful number, since it uses less digits than its factorization.

195109047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17572 (or 17566 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 195109047 is about 13968.1440069896. The cubic root of 195109047 is about 579.9970739052.

The spelling of 195109047 in words is "one hundred ninety-five million, one hundred nine thousand, forty-seven".