197922289 has 4 divisors (see below), whose sum is σ = 197953524. Its totient is φ = 197891056.

The previous prime is 197922281. The next prime is 197922301. The reversal of 197922289 is 982229791.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 195776064 + 2146225 = 13992^2 + 1465^2 .

It is a cyclic number.

It is not a de Polignac number, because 197922289 - 2³ = 197922281 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197922281) 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, 2362 + ... + 20035.

It is an arithmetic number, because the mean of its divisors is an integer number (49488381).

Almost surely, 2^197922289 is an apocalyptic number.

It is an amenable number.

197922289 is a deficient number, since it is larger than the sum of its proper divisors (31235).

197922289 is an equidigital number, since it uses as much as digits as its factorization.

197922289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31234.

The product of its digits is 326592, while the sum is 49.

The square root of 197922289 is about 14068.4856683298. The cubic root of 197922289 is about 582.7714063688.

The spelling of 197922289 in words is "one hundred ninety-seven million, nine hundred twenty-two thousand, two hundred eighty-nine".