195609793 has 2 divisors, whose sum is σ = 195609794. Its totient is φ = 195609792.

The previous prime is 195609773. The next prime is 195609797. The reversal of 195609793 is 397906591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140968129 + 54641664 = 11873^2 + 7392^2 .

It is an emirp because it is prime and its reverse (397906591) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195609793 is a prime.

It is a super-2 number, since 2×195609793² = 76526382235005698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (195609797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97804896 + 97804897.

It is an arithmetic number, because the mean of its divisors is an integer number (97804897).

Almost surely, 2^195609793 is an apocalyptic number.

It is an amenable number.

195609793 is a deficient number, since it is larger than the sum of its proper divisors (1).

195609793 is an equidigital number, since it uses as much as digits as its factorization.

195609793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 459270, while the sum is 49.

The square root of 195609793 is about 13986.0570926906. The cubic root of 195609793 is about 580.4928361634.

The spelling of 195609793 in words is "one hundred ninety-five million, six hundred nine thousand, seven hundred ninety-three".