195798289 has 4 divisors (see below), whose sum is σ = 196782400. Its totient is φ = 194814180.

The previous prime is 195798209. The next prime is 195798293. The reversal of 195798289 is 982897591.

195798289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 982897591 = 13 ⋅75607507.

It is a cyclic number.

It is not a de Polignac number, because 195798289 - 2²⁵ = 162243857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195798209) 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, 491757 + ... + 492154.

It is an arithmetic number, because the mean of its divisors is an integer number (49195600).

Almost surely, 2^195798289 is an apocalyptic number.

It is an amenable number.

195798289 is a deficient number, since it is larger than the sum of its proper divisors (984111).

195798289 is an equidigital number, since it uses as much as digits as its factorization.

195798289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984110.

The product of its digits is 3265920, while the sum is 58.

The square root of 195798289 is about 13992.7941812920. The cubic root of 195798289 is about 580.6792369355.

The spelling of 195798289 in words is "one hundred ninety-five million, seven hundred ninety-eight thousand, two hundred eighty-nine".