195387813 has 6 divisors (see below), whose sum is σ = 282226854. Its totient is φ = 130258536.

The previous prime is 195387799. The next prime is 195387869. The reversal of 195387813 is 318783591.

195387813 is a `hidden beast` number, since 195 + 387 + 81 + 3 = 666.

195387813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 145515969 + 49871844 = 12063^2 + 7062^2 .

It is not a de Polignac number, because 195387813 - 2⁵ = 195387781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195382813) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10854870 + ... + 10854887.

It is an arithmetic number, because the mean of its divisors is an integer number (47037809).

Almost surely, 2^195387813 is an apocalyptic number.

It is an amenable number.

195387813 is a deficient number, since it is larger than the sum of its proper divisors (86839041).

195387813 is a wasteful number, since it uses less digits than its factorization.

195387813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21709763 (or 21709760 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 195387813 is about 13978.1190794756. The cubic root of 195387813 is about 580.2731699739.

The spelling of 195387813 in words is "one hundred ninety-five million, three hundred eighty-seven thousand, eight hundred thirteen".