195625609 has 4 divisors (see below), whose sum is σ = 199787904. Its totient is φ = 191463316.

The previous prime is 195625583. The next prime is 195625627. The reversal of 195625609 is 906526591.

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 195625609 - 2⁷ = 195625481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195625669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2081077 + ... + 2081170.

It is an arithmetic number, because the mean of its divisors is an integer number (49946976).

Almost surely, 2^195625609 is an apocalyptic number.

It is an amenable number.

195625609 is a deficient number, since it is larger than the sum of its proper divisors (4162295).

195625609 is an equidigital number, since it uses as much as digits as its factorization.

195625609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4162294.

The product of its (nonzero) digits is 145800, while the sum is 43.

The square root of 195625609 is about 13986.6225015191. The cubic root of 195625609 is about 580.5084809617.

The spelling of 195625609 in words is "one hundred ninety-five million, six hundred twenty-five thousand, six hundred nine".