195009 has 4 divisors (see below), whose sum is σ = 260016. Its totient is φ = 130004.

The previous prime is 194989. The next prime is 195023. The reversal of 195009 is 900591.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 195009 - 2⁵ = 194977 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 195009.

It is not an unprimeable number, because it can be changed into a prime (195029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32499 + ... + 32504.

It is an arithmetic number, because the mean of its divisors is an integer number (65004).

2¹⁹⁵⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

195009 is a deficient number, since it is larger than the sum of its proper divisors (65007).

195009 is an equidigital number, since it uses as much as digits as its factorization.

195009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65006.

The product of its (nonzero) digits is 405, while the sum is 24.

The square root of 195009 is about 441.5982336921. The cubic root of 195009 is about 57.9897920997.

The spelling of 195009 in words is "one hundred ninety-five thousand, nine".