195828289 has 4 divisors (see below), whose sum is σ = 196853760. Its totient is φ = 194802820.

The previous prime is 195828263. The next prime is 195828293. The reversal of 195828289 is 982828591.

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 195828289 - 2¹⁵ = 195795521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195828229) 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, 512449 + ... + 512830.

It is an arithmetic number, because the mean of its divisors is an integer number (49213440).

Almost surely, 2^195828289 is an apocalyptic number.

It is an amenable number.

195828289 is a deficient number, since it is larger than the sum of its proper divisors (1025471).

195828289 is a wasteful number, since it uses less digits than its factorization.

195828289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025470.

The product of its digits is 829440, while the sum is 52.

The square root of 195828289 is about 13993.8661205544. The cubic root of 195828289 is about 580.7088924338.

The spelling of 195828289 in words is "one hundred ninety-five million, eight hundred twenty-eight thousand, two hundred eighty-nine".