195828591 has 8 divisors (see below), whose sum is σ = 298405504. Its totient is φ = 111902040.

The previous prime is 195828557. The next prime is 195828617.

195828591 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 195828591 - 2⁶ = 195828527 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 195828591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195828541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4662565 + ... + 4662606.

It is an arithmetic number, because the mean of its divisors is an integer number (37300688).

Almost surely, 2^195828591 is an apocalyptic number.

195828591 is a deficient number, since it is larger than the sum of its proper divisors (102576913).

195828591 is an equidigital number, since it uses as much as digits as its factorization.

195828591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9325181.

The product of its digits is 259200, while the sum is 48.

The square root of 195828591 is about 13993.8769109922. The cubic root of 195828591 is about 580.7091909504.

The spelling of 195828591 in words is "one hundred ninety-five million, eight hundred twenty-eight thousand, five hundred ninety-one".