197439289 has 8 divisors (see below), whose sum is σ = 204674688. Its totient is φ = 190303920.

The previous prime is 197439271. The next prime is 197439293. The reversal of 197439289 is 982934791.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 197439289 - 2⁹ = 197438777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197439239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20977 + ... + 28894.

It is an arithmetic number, because the mean of its divisors is an integer number (25584336).

Almost surely, 2^197439289 is an apocalyptic number.

It is an amenable number.

197439289 is a deficient number, since it is larger than the sum of its proper divisors (7235399).

197439289 is a wasteful number, since it uses less digits than its factorization.

197439289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50015.

The product of its digits is 979776, while the sum is 52.

The square root of 197439289 is about 14051.3091560893. The cubic root of 197439289 is about 582.2969644880.

The spelling of 197439289 in words is "one hundred ninety-seven million, four hundred thirty-nine thousand, two hundred eighty-nine".