195272789 has 2 divisors, whose sum is σ = 195272790. Its totient is φ = 195272788.

The previous prime is 195272771. The next prime is 195272807. The reversal of 195272789 is 987272591.

It is a balanced prime because it is at equal distance from previous prime (195272771) and next prime (195272807).

It can be written as a sum of positive squares in only one way, i.e., 192238225 + 3034564 = 13865^2 + 1742^2 .

It is a cyclic number.

It is not a de Polignac number, because 195272789 - 2¹⁶ = 195207253 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195272719) 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 as a sum of consecutive naturals, namely, 97636394 + 97636395.

It is an arithmetic number, because the mean of its divisors is an integer number (97636395).

Almost surely, 2^195272789 is an apocalyptic number.

It is an amenable number.

195272789 is a deficient number, since it is larger than the sum of its proper divisors (1).

195272789 is an equidigital number, since it uses as much as digits as its factorization.

195272789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 50.

The square root of 195272789 is about 13974.0040432225. The cubic root of 195272789 is about 580.1592794810.

The spelling of 195272789 in words is "one hundred ninety-five million, two hundred seventy-two thousand, seven hundred eighty-nine".