195800791 has 2 divisors, whose sum is σ = 195800792. Its totient is φ = 195800790.

The previous prime is 195800749. The next prime is 195800807. The reversal of 195800791 is 197008591.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 195800791 - 2¹³ = 195792599 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195800711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97900395 + 97900396.

It is an arithmetic number, because the mean of its divisors is an integer number (97900396).

Almost surely, 2^195800791 is an apocalyptic number.

195800791 is a deficient number, since it is larger than the sum of its proper divisors (1).

195800791 is an equidigital number, since it uses as much as digits as its factorization.

195800791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 40.

The square root of 195800791 is about 13992.8835841652. The cubic root of 195800791 is about 580.6817103199.

The spelling of 195800791 in words is "one hundred ninety-five million, eight hundred thousand, seven hundred ninety-one".