195597861 has 8 divisors (see below), whose sum is σ = 260897280. Its totient is φ = 130348512.

The previous prime is 195597851. The next prime is 195597877. The reversal of 195597861 is 168795591.

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

It is not a de Polignac number, because 195597861 - 2⁶ = 195597797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195597811) 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, 2181 + ... + 19898.

It is an arithmetic number, because the mean of its divisors is an integer number (32612160).

Almost surely, 2^195597861 is an apocalyptic number.

It is an amenable number.

195597861 is a deficient number, since it is larger than the sum of its proper divisors (65299419).

195597861 is a wasteful number, since it uses less digits than its factorization.

195597861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25035.

The product of its digits is 680400, while the sum is 51.

The square root of 195597861 is about 13985.6305185001. The cubic root of 195597861 is about 580.4810327643.

The spelling of 195597861 in words is "one hundred ninety-five million, five hundred ninety-seven thousand, eight hundred sixty-one".