195230691739 has 2 divisors, whose sum is σ = 195230691740. Its totient is φ = 195230691738.

The previous prime is 195230691731. The next prime is 195230691757. The reversal of 195230691739 is 937196032591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 195230691739 - 2³ = 195230691731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 195230691739.

It is not a weakly prime, because it can be changed into another prime (195230691731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97615345869 + 97615345870.

It is an arithmetic number, because the mean of its divisors is an integer number (97615345870).

Almost surely, 2^195230691739 is an apocalyptic number.

195230691739 is a deficient number, since it is larger than the sum of its proper divisors (1).

195230691739 is an equidigital number, since it uses as much as digits as its factorization.

195230691739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2755620, while the sum is 55.

The spelling of 195230691739 in words is "one hundred ninety-five billion, two hundred thirty million, six hundred ninety-one thousand, seven hundred thirty-nine".