195073813 has 4 divisors (see below), whose sum is σ = 212807808. Its totient is φ = 177339820.

The previous prime is 195073811. The next prime is 195073819. The reversal of 195073813 is 318370591.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 195073813 - 2¹ = 195073811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195073811) 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 3 ways as a sum of consecutive naturals, for example, 8866981 + ... + 8867002.

It is an arithmetic number, because the mean of its divisors is an integer number (53201952).

Almost surely, 2^195073813 is an apocalyptic number.

It is an amenable number.

195073813 is a deficient number, since it is larger than the sum of its proper divisors (17733995).

195073813 is a wasteful number, since it uses less digits than its factorization.

195073813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17733994.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 195073813 is about 13966.8827230703. The cubic root of 195073813 is about 579.9621586489.

The spelling of 195073813 in words is "one hundred ninety-five million, seventy-three thousand, eight hundred thirteen".