195332909 has 2 divisors, whose sum is σ = 195332910. Its totient is φ = 195332908.

The previous prime is 195332869. The next prime is 195332923. The reversal of 195332909 is 909233591.

It is a happy number.

195332909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178970884 + 16362025 = 13378^2 + 4045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195332909 is a prime.

It is a Sophie Germain prime.

It is a Chen 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 (195332959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97666454 + 97666455.

It is an arithmetic number, because the mean of its divisors is an integer number (97666455).

Almost surely, 2^195332909 is an apocalyptic number.

It is an amenable number.

195332909 is a deficient number, since it is larger than the sum of its proper divisors (1).

195332909 is an equidigital number, since it uses as much as digits as its factorization.

195332909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65610, while the sum is 41.

The square root of 195332909 is about 13976.1550148816. The cubic root of 195332909 is about 580.2188126042.

The spelling of 195332909 in words is "one hundred ninety-five million, three hundred thirty-two thousand, nine hundred nine".