195589609 has 2 divisors, whose sum is σ = 195589610. Its totient is φ = 195589608.

The previous prime is 195589561. The next prime is 195589613. The reversal of 195589609 is 906985591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151659225 + 43930384 = 12315^2 + 6628^2 .

It is a cyclic number.

It is not a de Polignac number, because 195589609 - 2¹⁵ = 195556841 is a prime.

It is not a weakly prime, because it can be changed into another prime (195589679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97794804 + 97794805.

It is an arithmetic number, because the mean of its divisors is an integer number (97794805).

Almost surely, 2^195589609 is an apocalyptic number.

It is an amenable number.

195589609 is a deficient number, since it is larger than the sum of its proper divisors (1).

195589609 is an equidigital number, since it uses as much as digits as its factorization.

195589609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 874800, while the sum is 52.

The square root of 195589609 is about 13985.3354982996. The cubic root of 195589609 is about 580.4728694220.

The spelling of 195589609 in words is "one hundred ninety-five million, five hundred eighty-nine thousand, six hundred nine".