195565009 has 8 divisors (see below), whose sum is σ = 203601960. Its totient is φ = 187614336.

The previous prime is 195565001. The next prime is 195565031. The reversal of 195565009 is 900565591.

It can be written as a sum of positive squares in 4 ways, for example, as 124609 + 195440400 = 353^2 + 13980^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 195565009 - 2³ = 195565001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195565001) 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 in 7 ways as a sum of consecutive naturals, for example, 16924 + ... + 26029.

It is an arithmetic number, because the mean of its divisors is an integer number (25450245).

Almost surely, 2^195565009 is an apocalyptic number.

It is an amenable number.

195565009 is a deficient number, since it is larger than the sum of its proper divisors (8036951).

195565009 is a wasteful number, since it uses less digits than its factorization.

195565009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43139.

The product of its (nonzero) digits is 60750, while the sum is 40.

The square root of 195565009 is about 13984.4559779778. The cubic root of 195565009 is about 580.4485323567.

The spelling of 195565009 in words is "one hundred ninety-five million, five hundred sixty-five thousand, nine".