195647109 has 16 divisors (see below), whose sum is σ = 299109888. Its totient is φ = 111430512.

The previous prime is 195647099. The next prime is 195647113. The reversal of 195647109 is 901746591.

195647109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 195647109 - 2⁵ = 195647077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195647129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8727 + ... + 21620.

It is an arithmetic number, because the mean of its divisors is an integer number (18694368).

Almost surely, 2^195647109 is an apocalyptic number.

It is an amenable number.

195647109 is a deficient number, since it is larger than the sum of its proper divisors (103462779).

195647109 is a wasteful number, since it uses less digits than its factorization.

195647109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30664.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 195647109 is about 13987.3910719619. The cubic root of 195647109 is about 580.5297468808.

The spelling of 195647109 in words is "one hundred ninety-five million, six hundred forty-seven thousand, one hundred nine".