195102489 has 16 divisors (see below), whose sum is σ = 276894720. Its totient is φ = 121770240.

The previous prime is 195102473. The next prime is 195102503. The reversal of 195102489 is 984201591.

It is not a de Polignac number, because 195102489 - 2⁴ = 195102473 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (195102449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274 + ... + 19755.

It is an arithmetic number, because the mean of its divisors is an integer number (17305920).

Almost surely, 2^195102489 is an apocalyptic number.

It is an amenable number.

195102489 is a deficient number, since it is larger than the sum of its proper divisors (81792231).

195102489 is a wasteful number, since it uses less digits than its factorization.

195102489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20240.

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 195102489 is about 13967.9092565781. The cubic root of 195102489 is about 579.9905755504.

It can be divided in two parts, 195102 and 489, that added together give a palindrome (195591).

The spelling of 195102489 in words is "one hundred ninety-five million, one hundred two thousand, four hundred eighty-nine".