195528909 has 8 divisors (see below), whose sum is σ = 261539392. Its totient is φ = 129935520.

The previous prime is 195528901. The next prime is 195528913. The reversal of 195528909 is 909825591.

It is a happy number.

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

It is not a de Polignac number, because 195528909 - 2³ = 195528901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195528901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103177 + ... + 105054.

It is an arithmetic number, because the mean of its divisors is an integer number (32692424).

Almost surely, 2^195528909 is an apocalyptic number.

It is an amenable number.

195528909 is a deficient number, since it is larger than the sum of its proper divisors (66010483).

195528909 is a wasteful number, since it uses less digits than its factorization.

195528909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208547.

The product of its (nonzero) digits is 291600, while the sum is 48.

The square root of 195528909 is about 13983.1651996249. The cubic root of 195528909 is about 580.4128145126.

The spelling of 195528909 in words is "one hundred ninety-five million, five hundred twenty-eight thousand, nine hundred nine".